Is 1000W PSu enough for 2 RTX 2080Ti?

iSeeThis

Most of the recommendation out there is for 1 card. Never found recommendation for 2 or more cards.

I may have to run the comp for hours from time to time (animation job). But mostly I don't think it will be exceed 10 mins per still image job. Till now never heard of hard-working fans. I think of buying new 1500W but I have to re-assemble everything again all day long (which cost more than a PSU). Thank you very much.

stephenschoon

I would expect so, of course it would also depend on CPU, number of hard disks and type etc...
S.

Hurdy3D

this may help you 

https://www.bequiet.com/en/psucalculator

kenshaw011267

iSeeThis said:

Most of the recommendation out there is for 1 card. Never found recommendation for 2 or more cards.

I may have to run the comp for hours from time to time (animation job). But mostly I don't think it will be exceed 10 mins per still image job. Till now never heard of hard-working fans. I think of buying new 1500W but I have to re-assemble everything again all day long (which cost more than a PSU). Thank you very much.

Each 2080ti, assuming they are not overclocked, should consume less than 300W even under full load. 600W plus another 150W or so for the CPU, drives etc. is on the high side for a 1000W but should be fine. 

One thing to keep in mind in the future is if you're spending the sort of money you are get a fully modular PSU which would allow you to swap out the PSU for another from the same manufacturer and you just unplug the cables from the old PSU and plug them into the new PSU.

It is vitally important however that you do not try this on a PSU from a different manufacturer. While the endsthat plug into other components are standdardized the ends that plug into the PSU are not and each manufacturer does it their own way.

iSeeThis

Thank you very much kenshaw011267, gerster and stephenschoon. I now have confidence to continue using the same arsenal.

p0rt

850w should be enough if it is a titanium rated PSU, a bronze rated 1000w will just be producing 200w in magetic fields because they have cheap capacitors

kenshaw011267

p0rt said:

850w should be enough if it is a titanium rated PSU, a bronze rated 1000w will just be producing 200w in magetic fields because they have cheap capacitors

? I have no idea what you're trying to say but an 850W supply could be at or very near 100% load and that is never a good idea. A 1000W 80+ Bronze, if there are such I've never bought a 1000W that was less than Gold, would not produce only 200W output in any in magnetic field less intense than the center of a cyclotron.

p0rt

kenshaw011267 said:

p0rt said:

850w should be enough if it is a titanium rated PSU, a bronze rated 1000w will just be producing 200w in magetic fields because they have cheap capacitors

? I have no idea what you're trying to say but an 850W supply could be at or very near 100% load and that is never a good idea. A 1000W 80+ Bronze, if there are such I've never bought a 1000W that was less than Gold, would not produce only 200W output in any in magnetic field less intense than the center of a cyclotron.

850w will work fine if its single rail the bronze to titanium rating on PSU:s the the efficiency, bronze starts at 80% while titanium is 95% efficient more rails a PSU has the less stable the power supply is as a result of energy fluxes

kenshaw011267

p0rt said:

kenshaw011267 said:

p0rt said:

850w should be enough if it is a titanium rated PSU, a bronze rated 1000w will just be producing 200w in magetic fields because they have cheap capacitors

? I have no idea what you're trying to say but an 850W supply could be at or very near 100% load and that is never a good idea. A 1000W 80+ Bronze, if there are such I've never bought a 1000W that was less than Gold, would not produce only 200W output in any in magnetic field less intense than the center of a cyclotron.

 

850w will work fine if its single rail the bronze to titanium rating on PSU:s the the efficiency, bronze starts at 80% while titanium is 95% efficient more rails a PSU has the less stable the power supply is as a result of energy fluxes

All 80+ rated supplies guarantee specific efficiency levels at 20% load, 50% load and 100% load. No 80+ rating tier guarantees 95% efficiency on 115V supply and only Titanium does on 230V.

Number of rails does not increase the PSU's output. It it's rated for 850W then having to 12V rails won't increase that. It just means there is more over current protection in the PSU on the 12V supply. This means the PSU is less likely to destroy itself or other components in shorts or in the case of a sudden spike in draw exceeding its rating. This does not make a PSU more or less stable. Multiple 12 V rails means the different 12V supply circuits are monitored individually rather than collectively which allows for the OCP to be set at lower levels than it is with a single rail. But any of those rails drawing enough current to trip the OCP is a very, very, very , very bad thing. 

p0rt

kenshaw011267 said:

p0rt said:

kenshaw011267 said:

p0rt said:

850w should be enough if it is a titanium rated PSU, a bronze rated 1000w will just be producing 200w in magetic fields because they have cheap capacitors

? I have no idea what you're trying to say but an 850W supply could be at or very near 100% load and that is never a good idea. A 1000W 80+ Bronze, if there are such I've never bought a 1000W that was less than Gold, would not produce only 200W output in any in magnetic field less intense than the center of a cyclotron.

 

850w will work fine if its single rail the bronze to titanium rating on PSU:s the the efficiency, bronze starts at 80% while titanium is 95% efficient more rails a PSU has the less stable the power supply is as a result of energy fluxes

All 80+ rated supplies guarantee specific efficiency levels at 20% load, 50% load and 100% load. No 80+ rating tier guarantees 95% efficiency on 115V supply and only Titanium does on 230V.

Number of rails does not increase the PSU's output. It it's rated for 850W then having to 12V rails won't increase that. It just means there is more over current protection in the PSU on the 12V supply. This means the PSU is less likely to destroy itself or other components in shorts or in the case of a sudden spike in draw exceeding its rating. This does not make a PSU more or less stable. Multiple 12 V rails means the different 12V supply circuits are monitored individually rather than collectively which allows for the OCP to be set at lower levels than it is with a single rail. But any of those rails drawing enough current to trip the OCP is a very, very, very , very bad thing. 

only a titanium rated PSU will give a 95% efficiency level,, aneruca's rating system mean's nothing, since the EU came along with ErP/EuP which is generally 30% more eifficient then america's energy star, so the EU's system is what most thing's are made complient to when it come's to the single factory production lines

kenshaw011267

? 80+ certification is what matters. A PC is Energy Star certified if it has at least an 80+ bronze PSU and has been submitted for certification. ErP and EuP are based off Energy star and do not require 30% more power efficiency (that would be hideously expensive for things like refridgerators). The EU plans really are completely immaterial to PSU's as long as you're dealing with 80+ bronze and better PSU's.

Even a 80+ Titanium PSU can only achieve 95% efficiency in a very certain scenario, 230V supply and near 50% load (at both 20% and 80% the guarantee is 94%)

 

jura

Hi there 1000W PSU should be more than enough for SLI or 2*RTX 2080Ti I have run 1250W PSU with 5960x OC to 4.7GHz and 3*GPUs(GTX1080Ti with 2113MHz OC GTX1080 with 2100MHz OC and GTX1080 with 2164MHz OC) then I added 4th GPU(Asus RTX 2080Ti Strix with 2160MHz OC) and I added extra PSU just to be on safe side because I have seen with 4*GPUs power load or power draw somewhere in 1150-1250W range, that's in Octane, Blender Cycles or IRAY Most of RTX 2080Ti have power limit as max 406W which in total is 812W plus CPU if you take etc you should be OK there, but this as always depends on GPUs used and CPU Hope this helps Thanks, Jura

rrward

I'm insane and went with a 1500W PSU. I'm pushing 2 2080ti's and a 1070ti, for the display only. But yes, if you're not overclocking your system 1000W is fine.

kenshaw011267

rrward said:

I'm insane and went with a 1500W PSU. I'm pushing 2 2080ti's and a 1070ti, for the display only. But yes, if you're not overclocking your system 1000W is fine.

You might have had an issue finding a 1000W PSU with enough PCIE 8 pins for all of that.

jura

rrward said:

I'm insane and went with a 1500W PSU. I'm pushing 2 2080ti's and a 1070ti, for the display only. But yes, if you're not overclocking your system 1000W is fine.

Hi there I'm now on Superflower 2000W PSU which I think would be more than enough for 8 GPUs and friend build which I have built have too 1500W PSU and this build have 7 RTX 2080Ti under water My build have 4 GPUs and under load I have seen max power consumption in region of 1250-1350W now with all GPUs OC Hope this helps Thanks, Jura

kenshaw011267

jura said:

rrward said:

I'm insane and went with a 1500W PSU. I'm pushing 2 2080ti's and a 1070ti, for the display only. But yes, if you're not overclocking your system 1000W is fine.

 

Hi there I'm now on Superflower 2000W PSU which I think would be more than enough for 8 GPUs and friend build which I have built have too 1500W PSU and this build have 7 RTX 2080Ti under water My build have 4 GPUs and under load I have seen max power consumption in region of 1250-1350W now with all GPUs OC Hope this helps Thanks, Jura

? I'll assume the fans and pumps pull 150W, likely would be more with that size loop but I'll lowball it. Any CPU draws at least 60W and the motherboard draws 10 to 20 minimum. Drives, I'll assume SSD's, pull another 5 to 10. I'll take the low end of everything and that comes out to 225. out of 1250 that's 1025 left. 1025/7 is 146W. The reference TDP of the 2080ti is 250W. All 2080ti's come with at least 2 8 pin PCIE power connectors meaning they are expected to draw somewhere between 150W and 300 plus 75W from the slot itself. Some of the factory OC models even have a third PCIE power connector.

I'm guessing it would be possible to undervolt, not overclock, a rig that size and get it to run at under 1500W but it wouldn't be easy. 

jura

kenshaw011267 said:

jura said:

rrward said:

I'm insane and went with a 1500W PSU. I'm pushing 2 2080ti's and a 1070ti, for the display only. But yes, if you're not overclocking your system 1000W is fine.

 

Hi there I'm now on Superflower 2000W PSU which I think would be more than enough for 8 GPUs and friend build which I have built have too 1500W PSU and this build have 7 RTX 2080Ti under water My build have 4 GPUs and under load I have seen max power consumption in region of 1250-1350W now with all GPUs OC Hope this helps Thanks, Jura

? I'll assume the fans and pumps pull 150W, likely would be more with that size loop but I'll lowball it. Any CPU draws at least 60W and the motherboard draws 10 to 20 minimum. Drives, I'll assume SSD's, pull another 5 to 10. I'll take the low end of everything and that comes out to 225. out of 1250 that's 1025 left. 1025/7 is 146W. The reference TDP of the 2080ti is 250W. All 2080ti's come with at least 2 8 pin PCIE power connectors meaning they are expected to draw somewhere between 150W and 300 plus 75W from the slot itself. Some of the factory OC models even have a third PCIE power connector.

I'm guessing it would be possible to undervolt, not overclock, a rig that size and get it to run at under 1500W but it wouldn't be easy. 

Fans and pumps won't pull 150W,in my case 6 Phanteks PH-F120MP pulls around 3-4W at 800-900RPM and 9 Arctic Cooling P12 PWM pulls around 3-4W at 1000-1200RPM, pumps are usually PWM and they usually pulls around 15-18W at max speed In rendering you are hardly see full 100% utilisation of GPU, tried few render engines or SW like IRAY, Octane or Cycles and Redshift, V-RAY etc and in these SW I see 70-80% GPU utilisation, friend loop is optimized to run at 1995MHz at 0.9-1v as max(yes as you said GPUs are running undervolted), temperatures he have pretty good and no issues, he is running 2x 420mm radiators and MO-ra3 360mm and dual D5 pumps, two NVMe 2TB and other SSD or normal SATA drives are just on NAS On other hand my loop is totally different, I have 4*360mm radiators plus MO-ra3 360mm with 4*GPUs and 7 normal SATA HDD, 3*2TB SSD and 5960x with 4.7GHz OC, 36 fans(9*Phanteks PH-F120MP, 18*Arctic P12 PWM,6*Corsair ML120 and 3*Noiseblocker eLoop 120mm), I didn't done power consumption tests for while and can't comment how high it is in rendering in new DS where RT is used fir denoise But I would do that later this week Yup stock RTX 2080Ti TDP is 250W but usually in rendering you won't see that, I done several tests and I'm nowhere near maxing TDP, you can check with HWiNFO or even GPU-Z power consumption On my Asus RTX 2080Ti Strix I flashed with different BIOS, Matrix BIOS whuch have higher power limit and in gaming this helps and clocks are more stable too in rendering which are in 2160MHz Hope this helps Thanks, Jura

kenshaw011267

Your claim was 7 2080ti overclocked on a 1500W supply. That is what I had an issue with. Now you say they;re undervolted. 

jura

kenshaw011267 said:

Your claim was 7 2080ti overclocked on a 1500W supply. That is what I had an issue with. Now you say they;re undervolted. 

Hi there I just checked what is power consumption in DS IRAY, with 4*GPUs all OC I have seen 902W power consumption from wall(used Killawatt), RTX 2080Ti power consumption in IRAY according to HWiNFO have been 167-180W, strangely GTX1080Ti power consumption have been 227W Hope this helps Thanks, Jura

iSeeThis

jura said:

kenshaw011267 said:

 

Hi there I just checked what is power consumption in DS IRAY, with 4*GPUs all OC I have seen 902W power consumption from wall(used Killawatt), RTX 2080Ti power consumption in IRAY according to HWiNFO have been 167-180W, strangely GTX1080Ti power consumption have been 227W Hope this helps Thanks, Jura

Thanks! Good to know so. I see that the manufacturer's recommendation is 600W for one 2080Ti but don't see any specific data like this. Wonder why not.

kenshaw011267

iSeeThis said:

jura said:

kenshaw011267 said:

 

Hi there I just checked what is power consumption in DS IRAY, with 4*GPUs all OC I have seen 902W power consumption from wall(used Killawatt), RTX 2080Ti power consumption in IRAY according to HWiNFO have been 167-180W, strangely GTX1080Ti power consumption have been 227W Hope this helps Thanks, Jura

Thanks! Good to know so. I see that the manufacturer's recommendation is 600W for one 2080Ti but don't see any specific data like this. Wonder why not.

Because it is up to each manufacturer to tweak the basic design so power consumption can vary widely. Also different work loads draw different amounts of power. CUDA applications that don't otherwise use the rest of the GPU should use less power than something like a game that uses the whole GPU.

kenshaw011267

sylvie1998 said:

Guys, I have RTX 2080 Ti which can pull up to 330 W (it is an MSI GeForce RTX 2080 Ti Gaming X TRIO). The card alone requires 2x PCIe 8-pin + 1x PCIe 6-pin cables.

That thing is designed to be able to draw a lot more than 330W. The slot provides 75, each 8 pin can provide 150W and the 6 pin can provide another 75W. So you could draw up to 450W based on the power delivery. You'd likely need to be putting it under a very heavy OC to get anywhere near that but that is what the card has available.

Swan

I have 2 2080 cards and a 1500W. Strongly recommend you get it. Three things to never skimp on: MB, video cards, & power supply.

jura

kenshaw011267 said:

sylvie1998 said:

Guys, I have RTX 2080 Ti which can pull up to 330 W (it is an MSI GeForce RTX 2080 Ti Gaming X TRIO). The card alone requires 2x PCIe 8-pin + 1x PCIe 6-pin cables.

That thing is designed to be able to draw a lot more than 330W. The slot provides 75, each 8 pin can provide 150W and the 6 pin can provide another 75W. So you could draw up to 450W based on the power delivery. You'd likely need to be putting it under a very heavy OC to get anywhere near that but that is what the card has available.

Hi there

I used on my Asus RTX2080Ti Strix XOC BIOS which is 1000W BIOS,most of time I run this BIOS with power limit/target locked at 45-50% which will pull 450-500W,running at 100% power target/limit GPU would pull 1000W,I done few test with this BIOS and max OC is 2175MHz,with lower ambient and water temps I would expect 2200MHz,this BIOS I use for benchmarks and my daily BIOS is Matrix BIOS which have power limit at 360W which is more than enough 

But agree in rendering you will never see full 100% power usage and yesterday i have tested GPUs(GTX1080Ti,GTX1080 and GTX1080) only in Octane and there I have seen probably lowest poower consumption which have been 602-625W,here is screenshot  as you can see GTX1080 with 2164MHz core load at 85% will pull just 89W(max 106W),other GTX1080 would pull 95W(max 109W) that's with 2100MHz and GTX1080Ti with 2113MHz would pull 121-150W as max,with RTX I seen power consumption close to 850W 

Hope this helps

Thanks,Jura

 

jura

Fuengirola said:

I have 2 2080 cards and a 1500W. Strongly recommend you get it. Three things to never skimp on: MB, video cards, & power supply.

Hi there

1500W for SLI/nVlink GPUs is way too much,1200-1300W would be probably still enough for something like is i9-7980XE/9980XE with OC and if you are have something like is i7-8700k/9900k etc you will and should be more than OK with 1000W,1500W is overkill and you are really don't need it

On PSU you shouldn't never skimp,choose wisely from companies like are Corsair,Seasonic,Silverstone and Super Flower,EVGA etc and MB or GPUs,this usually doesn't matter as much,just RMA and warranty will play bigger role than name etc,if you are have budget off course Asus or EVGA,MSI are best but have very good experience with Palit or Gainward

Hope this helps

Thanks,Jura

jura

sylvie1998 said:

Guys, I have RTX 2080 Ti which can pull up to 330 W (it is an MSI GeForce RTX 2080 Ti Gaming X TRIO). The card alone requires 2x PCIe 8-pin + 1x PCIe 6-pin cables.

I also have an Inte Core i7-9800X which itself can pull up to 170 W when not overclocked and my mainboard requires 1x 8-pin EPS12V + 1x 4-pin EPS12V cable for powering the CPU in addition to the standard 24-pin ATX power cable.

Whether you can run two 2080 Ti on a 1000W PSU therefore depends heavily on your other components. Most important lesson is -- don't skimp on your power supply or you will be putting all your expensive gear at risk.

Go with proven brands only such as Seasonic, don't buy noname or unknown/untested brands. If in doubt, check reviews at https://www.jonnyguru.com/ before buying.

Hi there 

As I above posted my screenshot of GPU usage and GPU consumption of my GPU's in Octane and MSI RTX2080Ti would never pull in rendering such wattage,usually would or will pull close to 250W maybe bit more,but I don't expect see there 330W,motherboard itself doesn't have high power consumption,CPU this depends on CPU,yours 9800X would pull such wattage,but I assume you are not OC at all or do you? If yes then whole TDP or power consumption will go out of window as you know then yes I would go with higher power wattage PSU

I have run on my previous build with 5960X with 4.7GHz and 3*GPUs(GTX1080TI,GTX1080 and another GTX1080) Seasonic XM2 1250W PSU and no issues,but agree with you regarding the skimping on PSU,I would never touch or use no name PSU,although I use water cooling gear from China(Barrow,Bykski) and no issue

Hope this helps

Thanks,Jura

 

iSeeThis

sylvie1998 said:

don't skimp on your power supply or you will be putting all your expensive gear at risk.

Go with proven brands only such as Seasonic, don't buy noname or unknown/untested brands. If in doubt, check reviews at https://www.jonnyguru.com/ before buying.

Thanks for your great advice. I didn't intend to take it lightly. Just have to reassemble all parts again and it takes a whole day.