RTX 4090: Multiple Monitor Configurations

[SimpleCast]

Hi everyone, 

I was searching for maximum resolution/hz support for multiple monitors on the RTX 4090. 

So far I could only find that it supports three 4K displays, but I have no idea if thats limited to 60Hz.

I know that DP1.4 can (on a singe monitor) run 4K 120Hz, so is it actually possible to run three 4K 120Hz monitors with a 4090?

Thanks for you help!

[jaslion]

If you get a 4090 with the needed ports it will do whatever you want.

 

It doesnt have a bandwith limit other than what each idividual port can do + the artificial max 4 displays

[podkall]

3 minutes ago, SimpleCast said:

Hi everyone, 

I was searching for maximum resolution/hz support for multiple monitors on the RTX 4090. 

So far I could only find that it supports three 4K displays, but I have no idea if thats limited to 60Hz.

I know that DP1.4 can (on a singe monitor) run 4K 120Hz, so is it actually possible to run three 4K 120Hz monitors with a 4090?

Thanks for you help!

why would you need to have multiple fully specced monitors

 

isn't one main monitor the only one that needs to be high Hz/quality/both

 

with designers that look at references on their 2nd monitor making it max 2?

[SimpleCast]

22 minutes ago, jaslion said:

If you get a 4090 with the needed ports it will do whatever you want.

 

It doesnt have a bandwith limit other than what each idividual port can do + the artificial max 4 displays

So if I understand correctly the only limit should be the capability of the individual ports, and within those limits I am able to combine monitors just how I like?

[SimpleCast]

22 minutes ago, podkall said:

why would you need to have multiple fully specced monitors

 

isn't one main monitor the only one that needs to be high Hz/quality/both

 

with designers that look at references on their 2nd monitor making it max 2?

Thats what I tried a bunch of years ago, but especially in multi display applications it hasn't gone as easy on my eyes as I had hoped. Plus Nvidia Surround had failed me on that, but maybe thats not even around anymore since as far as I know it has kinda been discontinued?

[podkall]

11 minutes ago, SimpleCast said:

Thats what I tried a bunch of years ago, but especially in multi display applications it hasn't gone as easy on my eyes as I had hoped. Plus Nvidia Surround had failed me on that, but maybe thats not even around anymore since as far as I know it has kinda been discontinued?

why use multi-display aplications? I have 2 monitors and have done nothing except arranging their priority and location in nvidia control panel..

[SimpleCast]

16 minutes ago, podkall said:

why use multi-display aplications? I have 2 monitors and have done nothing except arranging their priority and location in nvidia control panel..

It comes in quite handy when trying out to play a game in ultrawide for the immersion and to be honest I think Ive just gotten used to the workflow with e.g. video editing software. So I would like to see if I can just continue with an upgrade to a 4090

[podkall]

Just now, SimpleCast said:

It comes in quite handy when trying out to play a game in ultrawide for the immersion and to be honest I think Ive just gotten used to the workflow with e.g. video editing software. So I would like to see if I can just continue with an upgrade to a 4090

if you have 3 monitors how are you running them now?

[Blai5e]

@SimpleCast - well, I have 2 x 4k 160Hz monitors and sometimes I hook both up to my 4090 (via DP1.4) and they both run at the advertised 160Hz using Display Screen Stream Compression (DSC), so I don't see the issue with three monitors. Well... maybe trying to push that many pixels (3 x 8,294,400 = 24,883,200 pixels) might limit the achievable framerate.

[IkeaGnome]

 

11 minutes ago, Blai5e said:

Well... maybe trying to push that many pixels (3 x 8,294,400 = 24,883,200 pixels) might limit the achievable framerate.

It does it surprisingly well.

[SimpleCast]

First of all: thank you for your replies, you really helped me out!

@podkall i currently run them side by side and was planning on keeping that setup

@Blai5e thanks for your experience report, thats very reassuring to know what actually works.

@IkeaGnome those tests are so imressive. Ive looked up which monitors he uses, and theyre 4K 144Hz, so both resolution and refresh rate shoud be achieveable with a RTX 4090.

[Blai5e]

@SimpleCast - if I remember rightly, Kyle has 3 x LG 27GN950-B's. I have 1 x LG 27GN950-B (4K 144Hz, 160Hz overclocked) and a LG 32GP950-B (4K 144Hz, 160Hz overclocked). You'll only achieve 160Hz if you use Display Stream Compression (DSC) via DP 1.4 but it can be in 10-bit.

[SimpleCast]

@Blai5e thanks for the advice on how to get that extra refresh rate. The LG 27GN950-B is really impressive!

[yungdangus]

Late to this thread, but I am having an issue with this.

4090 FE

LG GP950-B x 2 (displayport 1.4)

LG C1 OLED 48" (hdmi 2.1)

 

I am unable to get nvidia control panel to let me select all three monitors at once. It will only let me pick 2. 

I was running this same setup except with one of the monitors being a 4k 60hz LG. And it worked for months. Since upgrading the second one to gp950-b, it will not. I even tried reducing the Hz on the second gp950 to 60hz and it still won't work. 

 

How is the guy in that video running THREE of this monitor at high fps if I cant? Nvidia support told me I have to disable DSC, but you can't on these monitors. 

 

Any advice greatly appreciated!