[SOLVED] How many high res monitors can video card support? How to calculate?

[fractal2003]

Hi,
I'm using pretty good video card GeForce RTX 2080 ti. That can support up to 7680x4320 resolution. Also it has 2 DisplayPort outputs and 2 HDMI outputs. So in theory I can plug 4 monitors. But I don't know how many high res monitors can this video card support. How to calculate this? For example right now I'm using one monitor 5120x2160. Could I plug extra 3 5120x2160 monitors and my card will say "that's ok". Or for example I only could use 4 of 1920x1080 monitors? I can't find any information about this in video card specs. And don't know how to calculate. Also I don't know will this affect on refresh rate. For example may be refresh rate will drop from 60 to 30 Hz. And bit depth. If I'm using 10 bits now, could card support 10 bits if I plug many monitors (that support 10 bits)?

 

[Aeacus]

The 7680x4320 resolution is for single port on GPU, not all ports combined. But it's the ports themselves that define the max reso and refresh rate they can provide.

For example:
MSI RTX 2080 Ti Gaming X Trio supports 7680x4320 reso, has 3x DisplayPort 1.4 and 1x HDMI 2.0b ports,
specs: https://www.msi.com/Graphics-card/GeForce-RTX-2080-Ti-GAMING-X-TRIO/Specification

DisplayPort 1.4 port doesn't have any trouble getting the 8K (7680x4320) monitor running at 24 Hz or 30 Hz. And with DSC, it can support 8K monitor at 60 Hz as well.
HDMI 2.0b port, however, can't support 8K (7680x4320) at all. Highest it can support is 5K (5120x2880) at 30 Hz or with 4:2:0 subsampling, at 60 Hz.

 

[fractal2003]

The 7680x4320 resolution is for single port on GPU, not all ports combined. But it's the ports themselves that define the max reso and refresh rate they can provide.

If I understand you correctly all ports on GPU are independent and if I have 4 ports on one GPU then I can plug 4 monitors and use them at highers resolution without any problems. Sure I understand that DisplayPort and HDMI have different versions so max resolution depends of type of connections.

 

[Aeacus]

all ports on GPU are independent and if I have 4 ports on one GPU then I can plug 4 monitors and use them at highers resolution without any problems.

Yes, that is so.