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OT: 2K image on a 1080 display

LeatherGryphonLeatherGryphon Posts: 11,673
edited January 2021 in The Commons

I'm confused.  I recently added a 27" 2K monitor (HP X27i) to my system.  But out of the same graphics card I've also left my old monitor(Acer S231HL) connected.  I set the Win10 resolution for my new monitor to 2560x1440 and just for jollies did the same for my old monitor which is spec'd at only HD (1920x1080) yet I get a decent 2K (2560x1440) image on it.  Yes, the text is tiny but it's actually quite legible.  Is it OK to run my old HD resolution monitor at 2K without frying something?

Specs for Acer-S23HL monitor below:

Edited to add:  I've also tested another HP monitor that I have (HP VH240a) spec'd at only 1920x1080 and it too presents a quite legible 2K image.  

Also added spec sheet for my new 2K monitor (HP X27i)  

What makes this possible?  What am I missing?  What's going on behind the curtain?  (*Sigh*) Technology was so simple when nothing was digital and vacuum tubes were all the rage.frown

 

Acer_Monitor-S231HL-Specs.png
562 x 713 - 67K
HP_Monitor VH240a_Specs.png
1008 x 1231 - 83K
HP_2K-Monitor X27i_Specs.png
983 x 1185 - 94K
Post edited by LeatherGryphon on

Comments

  • ebergerlyebergerly Posts: 3,255
    edited January 2021

    I'm  a bit surprised that you were able to get W10 to set a 2560x1440 resolution on a 1920x1080 monitor... usually it auto-detects the monitor resolution and sets that as the maximum available.

    Anyway, if you were successful, I assume it just does an interpolation to scrunch the 2560x1440 = 3,686,400 pixel image into the 1920x1080 = 2,073,600 pixels available in the existing monitors. 

    Post edited by ebergerly on
  • LeatherGryphonLeatherGryphon Posts: 11,673
    edited January 2021

    I didn't get the 2K resolution option until I added the 2K monitor to the graphics card.  And then it was available for the HD monitor too.  Magic behind the curtain.surprise 

    Note:  Graphics "card" is the motherboard's on-board graphics output from an Asus B-360M-A motherboard with an Intel i5-8600 CPU.  More details:  The output from the computer to the 2K monitor is via a 15 foot, 2K capable HDMI cable.  The output from the computer to the Asus HD monitor is via a 5 foot, "DVI to HDMI" conversion cable.

    --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- 

    Note2: I've also tested using an MSI Nvidia GeForce GTX-1660 graphics card in another computer. Results are similar but with the complication that if I set the 2K output to the HD monitor via the graphics card's Nvidia application software then the resolution is crude/ugly/wonky.sad  But if I set the 2K output to the HD monitor via Win10 the image is totally fine.  Go figure! surprise  More details:  The output from this computer to the same 27" 2K monitor as used by the 1st computer is via a 15 foot, DisplayPort cable.  The output from this 2nd computer to the HP HD (VH240a) monitor is via a 6 foot, DP to HDMI conversion cable.  Wheee..., fun with cables.indecision

    Post edited by LeatherGryphon on
  • IvyIvy Posts: 7,165
    edited January 2021

    I have 2 samsung 27" monitors. One is a Samsung S-HDtv  &  is connected VGA-HD  the other monitor is a samsung S Gaming & is connected HDMI  both are 2560x1440 and are connected to a external GPU accelerator box that holds 2-1080ti's with a 1800 watt uninterrupted power supply that runs the whole system if case the power goes out during rendering. 

    one thing I noticed right off is the HDTV monitor at 2560x1440  is much darker and takes more adjustment to match the gaming monitor I am not sure if its because  is connected vga instead of HDMi . but I found it much easier on my eyes to just run them both at 1920 x1080  I wish there was a way to make the font on the daz studio UI larger other wise I would keep my settings at 2560x1440

    Post edited by Ivy on
  • kyoto kidkyoto kid Posts: 41,249

    ...does that 1,800w UPS run on 120v?

  • LeatherGryphonLeatherGryphon Posts: 11,673
    edited February 2021

    kyoto kid said:

    ...does that 1,800w UPS run on 120v?

    UPS's are generally rated in KVA not watts.  1800 KVA x typical PowerFactor of 0.8 = 1440watts.  1440 watts/120v = 12 amps.  Yeah, it could work on a 15 amp circuit but don't make toast on the same circuit if your UPS is humming loudly. indecision

    Note:  PowerFactor is an AC vs DC sine wave related thing involving Reluctance instead of Resistance.

    Disclaimer:  I get my information from a 72 year old brain that was severely abused during the 1970s so excuse any slip ups.indecision  Sorry, it bugged me that I couldn't remember exactly what Power Factor was so I looked it up.  https://en.wikipedia.org/wiki/Volt-ampere

    Post edited by LeatherGryphon on
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