GTX 1080 Iray support?

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Comments

  • nickalamannickalaman Posts: 196

    When I first started working with Iray i had a GTX 780 with 3GB, a render took about 55 minutes on this card. Then i found a used 980ti render went down to 30 minutes, added a 2 used titan black and render time now 18 minutes.  From 55 minutes to 18 minutes, I thought I was happy.

     

     

    So now I redid the math, and Mec4d is correct, Iray is not very efficient, with all these cards in my system my render time should have gone from 55 minutes to 12 minutes instead of 18 minutes. Thanks Mec4d, I’m not as happy as I use to be, sometimes ignorance is bliss.

     

    I'd really be upset if i paid full price for these cards, but I was able to pick each titan for about $400 each and they still have a few month warranty left on them.

    Now's a good time to buy used cards, the hardcore gamers are getting rid of their 980ti and Titans to make room for the new GTX1080. Bottom line there are some really good deals out there for used cards these days.

    If buying used, my advice would be buy ASUS, one of my used titan overheated and died (my fault a loose wire touched one of the GPU fans and prevented it from spinning). Called ASUS, gave them serial number, told them i had no receipt. No problem within 2 weeks had new card.

    Mec4d’s bad news on efficiency aside, this is a fun hobby, maybe a bit expensive and not always smart investment, but still lots of fun.

    Anyway, It still beats spending my money on cigarettes, now that is a case of in-effeceincy. 1 year of non smoking paid for all my new hardware!

     

     

     

     

  • EveniosEvenios Posts: 119
    edited June 2016

    i hope this is updated in a few months i will get the 1080 gtx i dont mind waiting for a bit cuz ill be enjoying vr and games in the meantime but would be very nice to have iray and daz3d use the 1080 gtx "soon".

    and i agree that the titan x and 980 ti has more cores ......however. if your both a gamer and render but do the 3d rendering stuff more as more of a hobby side thing . the nice thing about the 1080 gtx is while it has less cores then say the  titan x. it requires less power . so i think best of both worlds really.   and it will still be 3 times better then the 960 gtx i use now lol.

    Post edited by Evenios on
  • MEC4DMEC4D Posts: 5,249

    Titan X don't use more than  60% power with iray so less than native  1080 and if you run 1080 faster than standard it will use the same power as Titan X in gaming  and superclocked even more so power usage in iray are generally low and if you gaming and rendering then  1080 will be the best choice for the hobbyists , we still need to see the real iray performance before judging , I may get myself one more to replace my monitors card as well due to less power .and better OpenGl performance and keep my TX-GPUs just for rendering or maybe I go with 1070 as I don't need the higher cuda numbers for what I need it for. The only thing here about Titan X are the memory other way  I would go with 980ti in first place , but Who knows what the next 2 years brings us .. 

    Evenios said:

    i hope this is updated in a few months i will get the 1080 gtx i dont mind waiting for a bit cuz ill be enjoying vr and games in the meantime but would be very nice to have iray and daz3d use the 1080 gtx "soon".

    and i agree that the titan x and 980 ti has more cores ......however. if your both a gamer and render but do the 3d rendering stuff more as more of a hobby side thing . the nice thing about the 1080 gtx is while it has less cores then say the  titan x. it requires less power . so i think best of both worlds really.   and it will still be 3 times better then the 960 gtx i use now lol.

     

  • nicsttnicstt Posts: 11,715
    edited June 2016

    "The performance for 980ti with Optix On is very poor compared to Titan Black it should be much faster"

    I ran this test again and it wenrt from 30 seconds to 28 seconds... a little faster.

    1 titan black + 980ti 39 seconds vs 2 titan black 43 seconds. so the 980ti is not slowing down.

     

     

    If you leave a render open, then all subsequent renders of the same scene will be faster as it doesn't have to load the information into the card again.

    Evenios said:

    i hope this is updated in a few months i will get the 1080 gtx i dont mind waiting for a bit cuz ill be enjoying vr and games in the meantime but would be very nice to have iray and daz3d use the 1080 gtx "soon".

    and i agree that the titan x and 980 ti has more cores ......however. if your both a gamer and render but do the 3d rendering stuff more as more of a hobby side thing . the nice thing about the 1080 gtx is while it has less cores then say the  titan x. it requires less power . so i think best of both worlds really.   and it will still be 3 times better then the 960 gtx i use now lol.

    Likely to be Daz soon, even thought it is beyond Daz's control. laugh

    Post edited by nicstt on
  • ANGELREAPER1972ANGELREAPER1972 Posts: 4,505
    MEC4D said:

    That is not a good idea , you need to focus on statistics not on renders , the quality of a render is based on the time you spend to render it so you can have cheap GPU and render it as long you want to get the sane quality as with GPU that is 10 times more expensive 

    I am building my rigs for 18 years , a quality cards means nothing if your system is outdated , you need to focus on what processor you have or want to have, how much lanes it have  then choice the right motherboard that support it and the numbers if GPUs you want, how much memory and how much power Supply you have and then based on that you can choice the cards to match your system for best performance and when you cheat on some parts then you are at risk to kill your system sooner or later or you will not even boot .

    We still don;t know how well 1080 will perform with iray so if you about to upgrade just wait and then you can make best choice based on real iray benchmarks and not by counting seconds in DS or look at pretty renders that is how things get bad and you waste your money vs performance , You can still buy cheaper cards for the same money you spend on high end GPUs and still have faster rendering power but the only bad side of this is that the cheaper GPUs don''t have as much video memory . In my last rig I skipped the 760 2 GB card for less cudas card, since I use it just for 2 monitors and the 4gb will be enough for the OpenGL in DS so I have my GPUs just for rendering power 

    from all rigs I build in the last 1 and half years for iray the best for the money was cheaper 2 GPU system with 4 core processor and 32GB memory .

    here are my 3 rigs I build from the past 18 months 

    ---------

    • Type : Air cooled / Water cooled
    • Motherboard : MSI X79 LGA 2011
    • CPU : i74820 K -40 PCI-s lanes- water cooled closed system
    • PSU Power : 800 W
    • RAM DDR 3: 16GB - max 64 GB
    • GPU 1 : Titan X SC - air cooled 
    • GPU 3 : GTX 760 - air cooled for monitor(s)
    • Case : Mid Tower

    _____________________________________________________________

    • Type : Air cooled / Water cooled closed system
    • Motherboard : Z97 LGA 1150
    • CPU : i74790 K - 16 PCI-e lanes water cooled closed system
    • PSU Power : 1000 W
    • RAM DDR 3 : 32GB
    • GPU 1 : Titan X SC - air cooled or hybrid
    • GPU 2 : Titan X SC-air cooled or hybrid
    • GPU 3 : GTX 760 - air cooled for monitor(s)
    • Case : Full Tower Case

    ____________________________________________________________

    • Type : Air cooled / Water cooled closed system
    • Motherboard : X99 LGA 2011 v3
    • CPU : i75960 X - 40 PCI-e lanes -water cooled closed system
    • PSU Power : 1300 W
    • RAM DDR 4 : 64GB
    • GPU 1 : Titan X SC 12GB- water cooled hybrid -closed system
    • GPU 2 : Titan X SC 12GB-water cooled hybrid -closed system
    • GPU 3 : Titan X SC 12GB-water cooled hybrid -closed system
    • GPU 4 : GT 730 4GB-air cooled for monitor(s)
    • Case:  Full tower open case - water cooling

    future upgrade to full open water cooling system for All GPUs and CPU

    any chance any of you post some example renders so we can see how much content - figures, backdrop, props extra are in your scenes and quality and then say what your systen setup is cards extra maybe have some basic scenes, medium scenes as well as more complex scenes including lots of characters doesn't have to be anything special looking just so we can judge the performance quality of the cards and rest of your computers specs probably help us more those planning on upgrading or buying new  computers on what we want/need to do the type of rendering 3d creation more than reading just statistics

     

    well that first setup you listed is pretty close to one of the ones I've been eyeing off from origin https://originpc.com.au/    their chronos pro system fully maxed out it's around $10,000 with 2 titanx, the other 2 the millenium and genesis at their lowest configs except for their mother boards and processors picked top ones there were 11-12+ only going for two drives to keep price down. the chronos has max 2 card setup the other 2 up to 4 cards but very pricy max power for chronos 850w, the other 2 up to 1500w, 2 1080s vs 2 titans about $1000 price difference. All 3 setups are liquid cooled with frostbyte and there is different sizes, genesis also has cryo liquid option again costly, cryo has to be maintained, frostbyte apparently never never needs changing/refilling no maintenence needed. constantly been looking at other sites and comparing price and parts on offer this site looks best option for me it's just the card thing 1080s vs titan x  and which model to go for that'll give me the best options in the long run + something that'll last me years it is a lot of money wont have again to get something like this just want to be able to create what I envision 

  • MEC4DMEC4D Posts: 5,249

    That have nothing to do , he was losing the perfomance on 980ti to Titan Black in general  if that was reverse the speed of 980ti+Titan Black would be  greater than the 3 cards he paried together in first test . 

    nicstt said:

    "The performance for 980ti with Optix On is very poor compared to Titan Black it should be much faster"

    I ran this test again and it wenrt from 30 seconds to 28 seconds... a little faster.

    1 titan black + 980ti 39 seconds vs 2 titan black 43 seconds. so the 980ti is not slowing down.

     

     

    If you leave a render open, then all subsequent renders of the same scene will be faster as it doesn't have to load the information into the card again.

     

  • MEC4DMEC4D Posts: 5,249

    Optix does not run with Cuda 8 so there will be patch for sure and not just driver upates for the card , so not early than next month or little longer and so far Daz update bugs fixed by Nvidia in time and this one is very important update you can't skip for later .

    nicstt said:
    Likely to be Daz soon, even thought it is beyond Daz's control. laugh

     

  • MEC4DMEC4D Posts: 5,249

    Crazy prices if you buy already done PC on the website

    • Type : Air cooled / Water cooled
    • Motherboard : MSI X79 LGA 2011 = $114
    • CPU : i74820 K -40 PCI-s lanes- water cooled closed system =$371+ $100 water cooled 
    • PSU Power : 800 W =$142
    • RAM DDR 3: 16GB - max 64 GB =$56
    • GPU 1 : Titan X SC - air cooled = $1099
    • GPU 3 : GTX 760 - air cooled for monitor(s) = $129
    • Case : Mid Tower = $43
    • SSD 500GB =$156

     Resume = $2210 without Titan X and 760 = $982

    now you can replace the 2 cards with 2 x 980ti or 2 x 1080 and add 16GB memory and you still not over $2.500

    Base: $982 + $56 16GB + $1158 2 x 980ti = $2196  

    even more cheaper and you rock in iray , comoany will charge you the money just for the base without the cards and the fact that they paid for the parts less than we paid online so have 100% profit.

    I can build computer faster than making evening dinner lol actually in 30 min ( without WIN instalation and tuning ) more easier and faster than making simply product for DS hehe

    MEC4D said:

     

     

    well that first setup you listed is pretty close to one of the ones I've been eyeing off from origin https://originpc.com.au/    their chronos pro system fully maxed out it's around $10,000 with 2 titanx, the other 2 the millenium and genesis at their lowest configs except for their mother boards and processors picked top ones there were 11-12+ only going for two drives to keep price down. the chronos has max 2 card setup the other 2 up to 4 cards but very pricy max power for chronos 850w, the other 2 up to 1500w, 2 1080s vs 2 titans about $1000 price difference. All 3 setups are liquid cooled with frostbyte and there is different sizes, genesis also has cryo liquid option again costly, cryo has to be maintained, frostbyte apparently never never needs changing/refilling no maintenence needed. constantly been looking at other sites and comparing price and parts on offer this site looks best option for me it's just the card thing 1080s vs titan x  and which model to go for that'll give me the best options in the long run + something that'll last me years it is a lot of money wont have again to get something like this just want to be able to create what I envision 

     

  • ANGELREAPER1972ANGELREAPER1972 Posts: 4,505
    edited June 2016

    guess living wrong part of the world looked on a few aussie sites, ones with prebuilt pcs, ones that you pick parts and they build it for you some more options than others, and ones that sell parts seperately cannot find any that sell those components hardly any sell titans and more expensive than your price, the gtx 760 noone has that again same with the other components cheapest titan x $1399, ok store bought prebuilt pcs for around price your build with nvidia cards 

    $2497 Lenovo Y700 i7 GTX960 Gaming Desktop with 1 2gb GeForce GTX 960 a 2 tb hybrid drive 16gb ram i7 600 processor,

    $2497 HP Envy 750-103A Desktop i7-6700 16gbram 3tb hd 4gb gtx745 

    $2986 Pryon Gamer AEG970 Gaming Desktop i7-4790 3tb sata 256gb ssd 4gb gtx970 

    $2996 Lenovo IdeaCentre Y700 i7 GTX970 Desktop i7-6700 16gb ram 2tb hybrid drive 120gb ssd 4gb gtx970

    $3796 Pryon Gamer AEG980 Gaming Desktop i7-4790 32gb ram 3tb sata 256gb ssd 4gb gtx 980

    $3997 Lenovo Y900 Gaming Desktop i7-6700k 32gb ram says expandable to 64gb (don't think they do that though) 2tb hybrid hdd+ssd 256ssd 4gb gtx 980 like the others 10usb don't know type none of these mention power supply or cooling setups

    my 3 year rent try buy contract v17 nitro laptop costs me $116 month so that 64gb Predator G6 reckon cost between that and maybe $150 month over 3 years maybe there's two versions so don't know which one they'll get in online stores sell them price to buy between $2999 and $3799 mentioned before read very tight inside no room to expand repairs difficult

    then there's alienware 51 - Intel® X99 Express Chipset w/ Unlocked BIOS for Overclocking*, CPU Socket 2011
    , 32GB (4X8GB) DDR4 2133MHz SDRAM Memory,  i7-5960X Processor (8-cores, 20MB Cache, Overclocked up to 4.0 GHz w/ Turbo Boost),Triple NVIDIA GeForce GTX 980 Ti with 18GB total (3x 6GB) GDDR5 - NVIDIA SLI Enabled, 850w, Processor Cooling
    Alienware Premium CPU Liquid Cooling. $9584.89
    Oculus ready version has a 1500w power supply option recomended well last time looked option didn't pop up this time 

    not many places are offering 1070/80s options yet reckon be extremely long time till any appear in local stores highest card options are gtx970s with some rare 980s and even rarer 980ti, titans huh except for origin and some part stores. Don't really except to see or will very suprised to see store pcs with 1070/80 cards for a few years yet and even then be only the basic early verion ones another this is small sized ssds on these computers almost what's the point that size can barely store anything on that after my last crash reinstalling on here found I had over 100gb of daz content to install and added lot more since then. Hopefully soon these new cards get updated and benchmarked for stuff other than gaming so we can see if they're worth getting sure they're less cores and memory than titans but if they can get more out of what they have as well as the less power,more speed as well as saving around $1000 well they do have a lot of positives going for them of course for gaming funny thing is before I thought these high end gaming computers with high end graphics and such meant these computers would be great at everything and could easily handle what we do here as well as stuff like zbrush now I learn it's the opposite, though I do admit if I did have a powerful machine with lots of room to save content I'd probably would do more pc gaming at least mostly games couldn't get for my consoles but still mostly daz, paintshop pro, maybe some video, and like to try some content creation zbrush and the like. Now I've said about going two cards but from what can make out from different things others been saying only one card is really used in daz iray and other for other stuff so if went one card be plenty but if did go two cards it'd enable me to fully use one card for daz iray and the second card would allow me to easily multitask and have other programs running and not crashing on me correct? I like to do have several things running at once render iray and be online and doing running other programs sometimes this one freezes up when rendering a complex scene and I'm trying to do something else maybe the 1080s be really good in that area read one reviewer had several pages open, a game running and some other programs running in the background

    Post edited by ANGELREAPER1972 on
  • ANGELREAPER1972ANGELREAPER1972 Posts: 4,505

    a non gaming benchmark tests on the 1070/80s vs 980ti and titan x, single and dual cards

    https://www.pugetsystems.com/labs/articles/GTX-1070-and-GTX-1080-Premiere-Pro-Performance-810/

  • ANGELREAPER1972ANGELREAPER1972 Posts: 4,505

    not sure if this helps much since iray and vray are different but maybe it'll give a rough idea when iray is supported but someone has tested the 1080 in vray 

    http://www.evermotion.org/articles/show/10189/geforce-gtx-1080-tested-with-v-ray

  • ANGELREAPER1972ANGELREAPER1972 Posts: 4,505

    question for marcus.hultin  ok so even though there is no iray support yet still going to assume your still using this 1080 setup for other stuff and maybe daz still using the other render options till we get iray support, so if you have them like reality and you we all do have 3delight don't know if different graphic cards have any effect really on 3delight but if do how goes it for that does work pretty well/better 

  • MEC4DMEC4D Posts: 5,249

    I was hopping better performance than that , but the 1070 is exactly what I would need for my no iray work we may expect this level with iray as the utilization is closer to the single GPU unless the driver get screwed on purpose ., however definitely not worth the actual price it is sold at this moment for this performance 

    BTW the last PC you mentioned is closer to my however 850W ? that is not possible to run 3 x 250W card with 140W CPU on 850W  the minimal is 1300W for 3-4 x250W

    ​with 850W you can't even run well 2 x 250W cards they will but not games as that would kill the system sooner , you need always little more PSU power as you need as PSU never run at 100% so always less power than it stated , and if it run closer to max the lifespan is shorter for both System and PSU 

    a non gaming benchmark tests on the 1070/80s vs 980ti and titan x, single and dual cards

    https://www.pugetsystems.com/labs/articles/GTX-1070-and-GTX-1080-Premiere-Pro-Performance-810/

     

  • MEC4DMEC4D Posts: 5,249

    The GPU utilization is actually closer , so it still not faster than my Titan X SC at 60% power usage and the one that will be faster will use more power and definitely need water block  to keep the temp on good level , if they sell it at the retail price then the deal is ok , I purchased the other day for my brother b-day EVGA 980Ti SC for $480 usd  .. that was a great deal 

    not sure if this helps much since iray and vray are different but maybe it'll give a rough idea when iray is supported but someone has tested the 1080 in vray 

    http://www.evermotion.org/articles/show/10189/geforce-gtx-1080-tested-with-v-ray

     

  • Trake118Trake118 Posts: 79

    Hmmm.... unfortunate these kinds of problems are going on.  Looks like this is something I'll have to check on before buying a Titan Pascal when they come out before getting one.  Looks like that might be on 6.1 or 6.2.  You'd think Nvidia would be more in a rush to ensure that their own software supports their own hardware. 

  • Trake118Trake118 Posts: 79

    Sorry about the double comment.  Anyone know if Octane supports 6.1 yet?

  • ANGELREAPER1972ANGELREAPER1972 Posts: 4,505
    edited June 2016
    MEC4D said:

    I was hopping better performance than that , but the 1070 is exactly what I would need for my no iray work we may expect this level with iray as the utilization is closer to the single GPU unless the driver get screwed on purpose ., however definitely not worth the actual price it is sold at this moment for this performance 

    BTW the last PC you mentioned is closer to my however 850W ? that is not possible to run 3 x 250W card with 140W CPU on 850W  the minimal is 1300W for 3-4 x250W

    ​with 850W you can't even run well 2 x 250W cards they will but not games as that would kill the system sooner , you need always little more PSU power as you need as PSU never run at 100% so always less power than it stated , and if it run closer to max the lifespan is shorter for both System and PSU 

    a non gaming benchmark tests on the 1070/80s vs 980ti and titan x, single and dual cards

    https://www.pugetsystems.com/labs/articles/GTX-1070-and-GTX-1080-Premiere-Pro-Performance-810/

     

    well just found seen few things that have really changed the options bit of a kick in the groin followed by having head slammed into brick wall. Well first you mean the Alienware? yeah well the aussie versions there are 2 one with the oculus rift and the other normal with the option up to 3 980ti cards and with the oculus version it tells you you have to add the 1500w power but other doesn't and is 850w but your saying that's not good the 850w bugger well I watched a 90 minute aussie review this guy did where he go one with a titanz which is weird since I have not seen any card option above 980ti anyway he also had a 1500w power now here is the kick in groin slam head in wall part he did not not know this either he could not plug it in because our power cords are 3 prongs and the bottom prong was lot bigger called in eletrician to put new power point in and explain Australia powerpoints are 10amps and this needed 15amp he said some shave bottom plug down to fit in and everything work awhile but it would kill the computer and or blowup power point and start fire hence he had to have 15amp installed and that is the next kicker unless you own your house the chances of getting permission from landlords or housing to do this is very slim plus hiring electrician to do it not cheap so these computers are not possible for many of us here think 1000w up be out average computer power cords are 650-850w lot under that too so that really reduces options and for many these 1070/80 new cards become very attractive they may not have as high cudas or vram they do have that speed, coolness and usage of less power being used very attractive to many, oh and 980ti rare too. Seen few been mentioning on the 1070/80 front other makers versions as well possible 1070/80ti versions next year don't really have high hopes seeing many of those being offered for very long time here after release we're not exactly/keep up to date with tech here I mean lot of pc builders or places that sell prebuilt pcs are just start to make big deal of 970/80's not ti versions and most still earlier cards so it is a suprise some -"some" places are offering builds with 1080s actually saw one place had a few builds with a 1080. Now tonight doing my usual seeing what pcs combos can choose from visited our origin site and Titans have gone way of the dodo none of their builds offer Titans anymore like just about everywhere else soooooo only two cards well 3 left to choose from 980ti, 1070 or 1080 so the pc was eyeing off max power supply is 850w so with the 4 maybe 5 if still offered at least one being ssd oh and it's water cooled is that combo ok  to run 2 980ti though still considering being a guinea pig for all of us and going for the 1080 cards even though gotta wait few months for iray updating if lucky it'll be good enough still at least better than what got now btw this model this month deal is free 2tb ssd upgrade and also I can't wait to long got a time limit to decide on new computer

     

    oh bugger edit just looked again in this chronos pro build only dual card options are quadro k6000 way tooo expensive double the price of this model maxed out, dual gtx 1070 and dual 1080 cards

    Post edited by ANGELREAPER1972 on
  • MEC4DMEC4D Posts: 5,249

    for 2 x 1080 you need 750W , for 2 x 1070 you need 700w , for 2 x 980ti you need 850w 1 x 600w and that are the standard not super clocked versions , the new faster versions of 1080 and 1070 will need 850W as they set it to use 250W 

    and with this cards and power supply you can't run i7 extreme series CPU as it use 140W and can go to 500W when over clocked .

    PSU use only as much as it need, so it is better to have little more than lose your system . 

    and of course for air cooling you need to run more fans and if not then you GPU will slow down to 50% when it heat 80C and you will run on one leg .

    and the fact that rendering use even less power than when playing a game is a good thing but it can run hotter and slow down the GPU very quick . 

     I would never use 850W with X99 and i7 extreme and 2 Titan X or 980ti,  the game would be over as you may be too short on power . The CPU is very hungry with double core count the 850W PSU would not even produce the 850W needed as they usually run at 80-90% depends on the type 

    when someone spend $1000 on CPU then should have the $200 for proper power supply as that is number one system failure 

    but since I don't play games my cards still not use all the power and as in my case each card use only 60% power out of 250W but the 1080 have a very high core clock so it may be not the case and it may need 180w what would be more that Titan X , but just speculating 

  • Silver DolphinSilver Dolphin Posts: 1,607
    MEC4D said:

    I am sure .. That what you see in your control software has nothing to do with what is happening in iray , the cards may run at full load and clock but the all resource is not used as rendering power with multiple GTX GPUs so only one of your card is actually used for rendering at 100% resource and the other just partially , only memory are used at the same level on all GPUs

    And actually not even 100% resource but 80% with basic rendering setting for the first card, 100% only if you use Optimization like Caustic and Architectural on . So 80% for the first card , 45% for the second etc.. etc.. 

    with iray you can''t stack the GTX GPU power or memory .. So how more GTX you add how less it is going to be used . And the best rig for iray rendering you can do for your money is having max 2 fast GTX GPUs in your system and one smaller for monitor and the best performance if they are from the same series . Unless you go pro and switch to Telsa or Quadro then things change as the cards run on own special iray driver but don''t waste your money yet since you will need 16 Quadros to have instant real time render in iray . But if you go just for one  cards, GTX 1080 will be faster than Quadro , as your 980ti is faster too , but with combination of other GTX card you losing the resource and energy .

    For the same reason you need SLI when when playing games for optimal result , you don't mix Titan Z and 980ti in SLI , you can only use SLI with two, three or four or more Identical GPUs. And if your CPU is not fast enough may result in even lower than expected GPU usage . Just because you don;t render with CPU don't mean you don;t need better and faster one when using multiple GPU's , Yes you do but in most case overclocking slightly the CPU will do the trick , even with my powerful i75960 X and 3 x Titan X SC cards I need to run the CPU at last 1Ghz faster  to gain the max performance to feed the 3 cards or everything slowing down even more , so to save the energy and resource I work preparing the scene with just 2 GPU's and CPU at standard clock and use my full system power and 3x GPUs when rendering the final image . Other way I am only killing slowly my GPU and CPU for nothing .

    So just because you stack all cards you have under hand for Iray means nothing , the statement that Iray will use all GPUs it finds in your system is only half of the story , and it will find them all but it does not tell you how much resource it will use . If that was the case nobody will spend 4K on workstation cards 

    and since we can't connect SLI bridge for the super GPU power to use with Iray , it is how it is ..

    so if you have 2 cards and one is faster than the other , iray can't render faster on one GPU and slower with the other , for that reason the slower card will slow down the rendering performance 

    The same situation is for example rendering with Adobe after effects , 1 card will run at 100% and if you add second only 50% faster so 150% on 2x GPUs , The same situation is with Blender Cycles little less good than that

    But then you switch to Octane rendering and add second card you gain 100% speed so total 200% with 2x GPUs but the best results are always the best when the GPUs are from the same series 

    and all the thing about stacking GPUs and gain more rendering power has nothing to do with the cards in general , but the software that run them with own limitations due to the coding or set this way by the owner on purpose. You will say they need new driver ? no because Octane can run the same cards with the same driver at full speed using all the card resource . I would better say you need an unlock key hidden in the special driver but it will cost you 4 x times more

     

    So if someone plan to make new rig, think about everything, not only GPU but Also the system that have to be efficient to allow you run it optimal .

    I made my new rig in December last year , well with 2 x Titan X SC and i74790K and 32 GB it was perfect fine set , then in May I added one more GPU and everything started to drag down , I had to upgrade the memory and CPU and at the end also motherboard so plan a head and stop focusing on stacking up the GPU only as it will not make anything faster .

    MEC4D said:

    Actually what will happen is the 960 will run at 100% and the 1080 will only maybe 40 % or less slowing down everything , that why I had to adjust my cards to the same clock speed for best perfomance, only if you use GTX card a side with Telsa or Quadro you  will profit from thanks to the special iray driver they have .

    mtl1 said:
    namffuak said:
    mecmec said:

    I've got a question about using a 1080 and a 960...

    I was lucky enough to order a 3rd party gtx 1080.  I've heard conflicting claims about how a card with lower memory (960 has 2GB, 1080 has 8GB) can limit the memory DAZ can use. My question is should / can I use both cards to power DAZ?  Or would the 960's 2GB actually hurt overall performance compared to just using the 1080?  Also I love IRAY and am a bit dissapointed that the 1080 is not yet suppported.  I was thinking I might need the 960 for IRAY renders for a month or so. But again I don't know if a dual 960 - 1080 setup would even work with IRAY?

     

    Thanks for reading!

    Iray treats all your gpu cards separately, loading the entire scene into each. So if the scene will fit in 2 GB of vram, both cards will be used. If the scene takes more than 2 GB, the 960 will be dropped and the 1080 will be running solo. Your best bet, once Iray supports the 1080, would be to use the 960 to drive your monitor(s) and let the 1080 handle the rendering.

    I believe even running the 960 alongside the 1080 will impede performance since the renderer needs to service both the slower and faster card simultaneously.

    As for SIGGRAPH, I was going to attend this year out of my own pocket (not work related unfortunately) but being a Canadian meant that the trip quickly turned unaffordable :(

     

    Are you sure about that, I have a Titan Z that runs at about 900mhz and a 980ti overclocked running at about 1300mhz the cards are at 100% load when rendering in iray, the 980ti is not slowimg down to match the titan Z speeds. I've confirmed these numbers with GPUz. I've also compared my results with octane bench and my cards add up singe scroes versus multiple cards with a slight drop in multiple only due to heat.

    When i run tests in iray i always keep the aux window open in iray but size it very small, 50x50 pixels, this keeps the scene in memory, so when you render there is no overhead for loading, same goes when switching the main view from texture shaded to iray. If you render this way adding multiple cards scales very well with almost no loss.

     

     

     

     

     

    Yeah I have 1x nvidia 640 gt 2gb just running my monitors and 3x nvidia 780 6gb editions just for renders and I watched speed increse in render times as I added cards. My iray render are all under 2mins with hdri lighting. I should mention that my system is a Intel i7 6 core with 64 gigs of ram win7pro 64bit. I think if you want to use 3 or more graphic cards you need a lot of ram 32 may not be enough for three high end graphics cards and enough pcie slots and atleast a 1000watt power supply.

  • ANGELREAPER1972ANGELREAPER1972 Posts: 4,505

    when I get a chance I'll take some screen grabs or something so can nail down best options for me MEC4D but yeah this one with the 2 1080s is looking like the best closest I can get price quality wise for me anyway just gotta hope these cards prove themselves once they get the iray update if not have to get another cheap one with lower card but still  decent lots of those on offer they tout as super computers but not really but will do the job and yeah I could go that way in the first place but would be nice to have a powerhouse don't laugh this'd still be a powerhouse for me and more so then most would have down here. Yeah I'd like to use computer for a lot of different stuff and do do a lot of multitasking and probably have a lot of stuff running even gaming probably so if the 1080s don't prove their worth on iray was setup for that probably use that one for my other stuff and get one of those others.  And like said Titans are rare and looks like being phased out not appearing as options anywhere really as are 980ti. Got another question stuff like Zbrush, marvelous designer, substance painter and other related programs to create daz content do they make use of dual cards or just one

  • FirePro9FirePro9 Posts: 456

    Saw this article about nVidia not supporting 3 & 4 way SLI starting with the 1080.....not good for us rendering folks.

    http://www.pcworld.com/article/3071332/hardware/its-true-nvidias-geforce-gtx-1080-officially-supports-only-2-way-sli-setups.html

    Actually the article does mention a way to get the 3 & 4 way SLI to work with the 1080 but sounds like you got to jump through some hoops to make it work.

  • hphoenixhphoenix Posts: 1,335

    Iray doesn't use SLI.  It accesses the GPUs independently.  You can still have more than 2 cards and have Iray use them just fine.  It just won't help gamers unless the game companies start including the needed code to handle multi-GPU beyond 2.....

     

  • ANGELREAPER1972ANGELREAPER1972 Posts: 4,505

    actually FirePro9 they've changed their stance few times latest update saw was 2 card max on the 1070/80s and yeah there was the option for more if you begged them for an unlocking code but then decided to do away with that but made it useless really to have more than two and making it only for using 3 or 4 cards for things like benchmarking to compare to other cards in 3 or 4 way which is really what's the point of that if you can't make use of them that way for anything else they'd be a lot that rushed out buying 4 cards going through hoops to unlock them swearing cause they can't do anything else than benchmarking with 4 cards unless they had another computer to put the spare two cards in

  • MEC4DMEC4D Posts: 5,249

    The subject was about how slower cards decrease the total performance when parred with faster cards  , I run i75960x 8 cores 40 lanes ( support 4 cards ) and 64GB as my 3 cards need 36GB of the  system memory , but you can have 4 core processor for 4 cards as iray will not use more so less cores processor with faster  threads will do better than a lot of cores at lower clock speed . But the most important are the GPU temp 

    MEC4D said:

     

    Yeah I have 1x nvidia 640 gt 2gb just running my monitors and 3x nvidia 780 6gb editions just for renders and I watched speed increse in render times as I added cards. My iray render are all under 2mins with hdri lighting. I should mention that my system is a Intel i7 6 core with 64 gigs of ram win7pro 64bit. I think if you want to use 3 or more graphic cards you need a lot of ram 32 may not be enough for three high end graphics cards and enough pcie slots and atleast a 1000watt power supply.

     

  • MEC4DMEC4D Posts: 5,249

    The rigs are done mostly for games  and less as workstations so you don;t need 12GB cards to run a game .

    Other programs do not use multiple GPU rendering technology so mostly the card that is attached to the monitor is used for the task, when I do 3D work in PS or AEI need to switch the monitor , Zbrush use the power of your CPU , it was running 500% slower on 4 cores i74790 than on 8 cores i75960x as it use multithread technology and not cuda cores so you can have  $100 video card and still do the job .and as much RAM as you can manage in your system .

    when I get a chance I'll take some screen grabs or something so can nail down best options for me MEC4D but yeah this one with the 2 1080s is looking like the best closest I can get price quality wise for me anyway just gotta hope these cards prove themselves once they get the iray update if not have to get another cheap one with lower card but still  decent lots of those on offer they tout as super computers but not really but will do the job and yeah I could go that way in the first place but would be nice to have a powerhouse don't laugh this'd still be a powerhouse for me and more so then most would have down here. Yeah I'd like to use computer for a lot of different stuff and do do a lot of multitasking and probably have a lot of stuff running even gaming probably so if the 1080s don't prove their worth on iray was setup for that probably use that one for my other stuff and get one of those others.  And like said Titans are rare and looks like being phased out not appearing as options anywhere really as are 980ti. Got another question stuff like Zbrush, marvelous designer, substance painter and other related programs to create daz content do they make use of dual cards or just one

     

  • MEC4DMEC4D Posts: 5,249

    NVIDIA stopped supporting SLI for more than 2 cards , you need request a code from NVIDIA if you want to use more than 2 cards in SLI for games

    and as hphoenix said for iray you don't need SLI or any unlock codes  

    FirePro9 said:

    Saw this article about nVidia not supporting 3 & 4 way SLI starting with the 1080.....not good for us rendering folks.

    http://www.pcworld.com/article/3071332/hardware/its-true-nvidias-geforce-gtx-1080-officially-supports-only-2-way-sli-setups.html

    Actually the article does mention a way to get the 3 & 4 way SLI to work with the 1080 but sounds like you got to jump through some hoops to make it work.

     

  • nicsttnicstt Posts: 11,715
    MEC4D said:

    NVIDIA stopped supporting SLI for more than 2 cards , you need request a code from NVIDIA if you want to use more than 2 cards in SLI for games

    and as hphoenix said for iray you don't need SLI or any unlock codes  

    FirePro9 said:

    Saw this article about nVidia not supporting 3 & 4 way SLI starting with the 1080.....not good for us rendering folks.

    http://www.pcworld.com/article/3071332/hardware/its-true-nvidias-geforce-gtx-1080-officially-supports-only-2-way-sli-setups.html

    Actually the article does mention a way to get the 3 & 4 way SLI to work with the 1080 but sounds like you got to jump through some hoops to make it work.

     

    I'd say it isn't that you don't need SLI, but that using it can have a detrimental effect on IRAY; always make sure it is disabled when rendering if you have SLI set up.

  • MEC4DMEC4D Posts: 5,249

    It will just use one card if the SLI is turned on asI forgot once and iray can use just 1 card as the rest are hidden internally from iray engine even if visible under render settings . 

    the point is that SLI is not needed for rendering with iray and should be disable for best performance and PhysX set to additional monitor card or CPU if possible 

    nicstt said:
    MEC4D said:

    NVIDIA stopped supporting SLI for more than 2 cards , you need request a code from NVIDIA if you want to use more than 2 cards in SLI for games

    and as hphoenix said for iray you don't need SLI or any unlock codes  

    FirePro9 said:

    Saw this article about nVidia not supporting 3 & 4 way SLI starting with the 1080.....not good for us rendering folks.

    http://www.pcworld.com/article/3071332/hardware/its-true-nvidias-geforce-gtx-1080-officially-supports-only-2-way-sli-setups.html

    Actually the article does mention a way to get the 3 & 4 way SLI to work with the 1080 but sounds like you got to jump through some hoops to make it work.

     

    I'd say it isn't that you don't need SLI, but that using it can have a detrimental effect on IRAY; always make sure it is disabled when rendering if you have SLI set up.

     

  • ANGELREAPER1972ANGELREAPER1972 Posts: 4,505

    so really there is no use point in having 2 cards in sli then. nice to know can use just about any card for zbrush and others so long it's nvidia think saw that required just need a lot of space to save for z. Well most pcs offered here from local stores premade, those that build their own and those that give you custon build options are gamer computers with the rest being very very very very basic basic computers built just to really browse online. There are a tiny number of places that offer computers that are classified for other areas video editing, photoshop and 3d creation so they say but are very very basic in what they offer small drives and low end cards so for most part the gamer ones offer so much more and can do more. Well if 2 cards in sli for example gtx 1080 over just having one card and one gtx 1080 is more than enough to do whatever I want and multitask with several things running that'll save me a fair bit and give me more options also reduces amount power supply needed correct? So 850w more than enough? Though 850w is max power supply get with that C-Pro, those other two rigs still to much for not much even though one had 64gb memory, 32gb still really good though right? Anyway the single gtx 1080 makes another computer in my reach yes it's billed as a gamer but the price allows me to get extra drives even has 8tb drives though that raises price fair bit and 5x 4tb drives should take long time to fill up so below my two new choice builds chronos still basicly same but with one gtx 1080 card and the other hopefully you say the 850w power is enough for this build, oh and one thing with this single card option if it turns out the single gtx 1080 isn't enough or good enough when it's iray ready can get add another card for just iraying and use the 1080 for everything else

    Chronos pro - high performance silent fans, ASUS Maximus VIII Gene, FROSTBYTE 240 Sealed Liquid Cooling System, Intel Core i7 6700K Quad-Core 4.0GHz , 850w tough power 80+gold, single gtx1080, 32GB Corsair Dominator Platinum DDR4 3000Mhz,
    raid1, 1tb ssd, 3 4TB Western Digital Black SATA 6.0Gb/s, 7200RPM, 64MB Cache

    battlebox -  High-Performance Ultra Silent Fans, EVGA Z170 Classified,  FROSTBYTE 240 Sealed Liquid Cooling System for 1151 Socket, Intel Core i7 6700K Quad-Core 4.0GHz,  Professional Processor Overclocking (yes or no), Thermal Compound-GELID GC-Extreme CPU Application, single gtx 1080, 32GB Corsair Dominator Platinum DDR4 3000Mhz, 
    raid 1, 2 x operating system drives both 1TB Samsung 850 Pro Series, HotSwap Drives RAID Configuration-raid 10, 5 x 4TB Seagate Solid State Hybrid Drives, 850 Watt Corsair RM850

  • hphoenixhphoenix Posts: 1,335
    MEC4D said:

    NVIDIA stopped supporting SLI for more than 2 cards , you need request a code from NVIDIA if you want to use more than 2 cards in SLI for games

    and as hphoenix said for iray you don't need SLI or any unlock codes  

    Actually, just a few days ago nVidia announced it was NOT going to provide codes and that only Benchmarking programs (or programs developed to utilize beyond the second card) would support 3 and 4 way SLI.  So no support for 3 and 4 way profiles for SLI without the support being directly in the app (i.e., the driver is not going to provide that support).

     

     

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