Hello everyone. I have a problem, and as meatloaf would put it... 2/3 ain't bad. Except it is because I want all three!
 
So here's the deal. I've got three monitors and can only ever do display out to (any) 2 out of the three at once. This is regardless of which resolution/refreshrate/color depth I set on the monitors. After two are enabled, the third won't turn on when trying to expand the desktop. I have tried in both nvidia control panel and windows display settings to enable the third and always receive some combination of 'display connection error' even though all three are 'recognized' by windows and nvidia. 
 
27GN950-B @ 4K160HZ DSC DP 1.4 (was originally a 3440x1440 120hz monitor)
27GN950-B @ 4K160HZ DSC DP 1.4
LG C1 @ 4K120HZ HDMI 2.1

3080 Ti
5950x
Windows 10
 
 
I did speak to a EVGA rep on the phone trying to troubleshoot this, and he basically told me to pound sand and that 2, 4k monitors is the max my GPU will support (he kept telling me 2x 4k is the same as 8k). I told him that before I got my second 27GN950 I had an ultrawide that ran just fine with the other two screens enabled. The issue only started when I switched the ultrawide monitor to a 4k one. 
 
I'll compile a list of troubleshooting that I've tried below:
 
Complete DDU + driver reinstall
Monitor drivers installed
Tried to reduce resolution/refresh rate
Tried enabling surround display in nvidia CP
Swapped cables
 
If anyone has an idea of what I can do to fix this I would be very grateful. Thank you for your time! 
 
Update: Found a working solution! Somehow (even though it was tried before) some combination of driver/display updates plus turning the 160hs OC off on ONE monitor has now allowed me to have all three displays connected at once. Thank you all!

Yes that is my concern. I inquired about an RMA and the rep said its 3 weeks + that I'll have to go without the card if I need it fixed/replaced. My worry is that they are going to check to see that it 'runs' and then send it back after three weeks with nothing fixed. It's literally just the third display out that I can't do and only with these particular monitors. My suspicion is that it's a software bug, hopefully one that might have a solution available before I yank my hydrocopper out to send in.

anticommon
Hello everyone. I have a problem, and as meatloaf would put it... 2/3 ain't bad. Except it is because I want all three!
 
So here's the deal. I've got three monitors and can only ever do display out to (any) 2 out of the three at once. This is regardless of which resolution/refreshrate/color depth I set on the monitors. After two are enabled, the third won't turn on when trying to expand the desktop. I have tried in both nvidia control panel and windows display settings to enable the third and always receive some combination of 'display connection error' even though all three are 'recognized' by windows and nvidia. 
 
27GN950-B @ 4K160HZ DSC DP 1.4 (was originally a 3440x1440 120hz monitor)
27GN950-B @ 4K160HZ DSC DP 1.4
LG C1 @ 4K120HZ HDMI 2.1

3080 Ti
5950x
Windows 10
 
 
I did speak to a EVGA rep on the phone trying to troubleshoot this, and he basically told me to pound sand and that 2, 4k monitors is the max my GPU will support (he kept telling me 2x 4k is the same as 8k). I told him that before I got my second 27GN950 I had an ultrawide that ran just fine with the other two screens enabled. The issue only started when I switched the ultrawide monitor to a 4k one. 
 
I'll compile a list of troubleshooting that I've tried below:
 
Complete DDU + driver reinstall
Monitor drivers installed
Tried to reduce resolution/refresh rate
Tried enabling surround display in nvidia CP
Swapped cables
 
If anyone has an idea of what I can do to fix this I would be very grateful. Thank you for your time! 

That rep doesn't know what he's talking about.
 
Did you swap cables and inputs from the GPU to see if any of those were the issue?  

GTXJackBauer
 
 
That rep doesn't know what he's talking about.
 
Did you swap cables and inputs from the GPU to see if any of those were the issue?  
 

Yes, I have tried all available combinations. I guess the only one that hasn't changed is the TV since there is only one single HDMI 2.1 port available (and I have only one HDMI 2.1 cable) however I feel as though the issue is unlikely to be related to cables considering I can get display out to any of the monitors I want (with some settings fiddling) but just never all three (always fails when attempting to enable third monitor regardless of which one that is).
 
I would also add that I have tried fully power cycling both monitors and the TV. 

anticommon

GTXJackBauer
 
 
That rep doesn't know what he's talking about.
 
Did you swap cables and inputs from the GPU to see if any of those were the issue?  
 

Yes, I have tried all available combinations. I guess the only one that hasn't changed is the TV since there is only one single HDMI 2.1 port available (and I have only one HDMI 2.1 cable) however I feel as though the issue is unlikely to be related to cables considering I can get display out to any of the monitors I want (with some settings fiddling) but just never all three (always fails when attempting to enable third monitor regardless of which one that is).
 
I would also add that I have tried fully power cycling both monitors and the TV. 

So all cables have been tested.  Have all input been tested?  If so, you're basically saying no matter what, they all work but just in 2s and not all 3 screens?


If yes, my next test would be rolling back the GPU drivers just to test out a few older ones.  Not too old but within the 3000 series timeline.

anticommon

GTXJackBauer
 
So all cables have been tested.  Have all input been tested?  If so, you're basically saying no matter what, they all work but just in 2s and not all 3 screens?
 
If yes, my next test would be rolling back the GPU drivers just to test out a few older ones.  Not too old but within the 3000 series timeline.

I have tried all available DP ports (was wondering if maybe one of the DP and the HDMI ports might 'share lanes'). I can probably find the time this weekend to try out some older drivers. I hesitate to make it a permanent exercise as there are some game ready drivers from the last few months that I would really rather not go without, but for the sake of troubleshooting I will try. Maybe if I can find a driver that works I can send something in to the engineering team to send them a bug report. Or maybe my card really is borked. Luckily I only paid $1800. Can't even buy a bushel of bananas for that much these days.

Sounds like a good idea. 

There have been issues with Nvidia surrounds in the past when new stuff comes around.  Hopefully you'll find out soon if it's software or hardware and get that RMA process started if need be.

Sounds like you've already tried this but if not you can update gpu firmware here:
 
https://nvidia.custhelp.com/app/answers/detail/a_id/5233/
 
It solved a separate issue for me of not being able to get the bios screen to show up on a monitor with display port.
 
 

anticommon
 
Whats funny about what you mentioned though is that I also cannot access the bios on these monitors (27GN950) when connected through displayport.
 

Systems get wonky sometimes and prefer the screen that's connected to HDMI.  I'd check that out to see if you can get access to your BIOS.

anticommon

Sir_Sizzle77
Sounds like you've already tried this but if not you can update gpu firmware here:
 
 
 
It solved a separate issue for me of not being able to get the bios screen to show up on a monitor with display port.
 

 
I did update the GPU bios a short while back, I'll have to check if there is a new release. I believe the release I'm on is the one that enabled rebar (or whatever the nvidia naming equivalent is) so maybe there is a newer one. I'm also going to try disabling rebar to see if that is causing this issue. 
 
Whats funny about what you mentioned though is that I also cannot access the bios on these monitors (27GN950) when connected through displayport. I believe it has something to do with not sending/receiving the wakeup signal from the PC until windows loads. Maybe a firmware update will fix that for me... worth a shot!
 
 

acupalypse
I'm going to guess it's a cable + driver combo. I had the same issue with 2060 having 4 monitors. Updating drivers removed the 4th monitor. Rolling back the driver OR changing the cable made it work.

if all else fails I'll order a whole set of new cables. The only trouble is finding ones that are 100% bandwidth and continuity compliant. Kinda wish I had Linus's $100k cable testing machine... 

Good luck hope you find a solution.

I also used the Advice from Anthony Vaughan from this post and booted with just my main dp monitor into bios.  I plugged in my secondary hdmi monitor afterwards and now bios shows up on the main dp screen.
 
https://superuser.com/questions/1141431/system-boots-on-the-secondary-monitor-with-dual-screens
 
Before I did the firmware update I also just got a blank screen on both monitors if dp and hdmi were connected.  The firmware update let me see bios on secondary hdmi monitor if dp was connected as well.  Then I used the tip from above to get bios onto the correct monitor.

Sir_Sizzle77
 
congradulations.  Was it the main 27GN950-B you lowerd the clock on?  I also had to go from 144hz to 120hz to keep my monitor from flickering and off once in a while.

At first yes, but after seeing it work I was able to successfully swap it over to my side monitor so my primary (gaming) monitor can still be 160hz.

Glad you found something that worked, what resolution are you running now and is it in surround?

Glad to see this resolved. Sad that the original post mentioned Meatloaf given his death, but it's a reminder of how impactful his music was.