Screen flicker when gaming, video and more information in post - 3080 Ti FE & LG 34GN850-B monitor

takkischitt · 20 Aug 2021 at 12:21

Sorry for the poor video quality, these issues don't show up when using Shadowplay to capture the screen, so I had to hold my GoPro in front of the screen to capture the issues. I've added a screenshot of the flicker after each time it happens so you can see it better. It's more noticable during gameplay, the camera didnt pick it up as bright as it is in real life.

I've been having these graphical issues since I got the 3080 ti Founders Edition at launch, although I got the LG 34gn850-b around the same time, so hard to know which is at fault. Things are fine in Windows 10, but has issues in some games. Mostly it is the flickers/flashes across the screen, these happen several times a minute. Less often, but still quite regularly, the screen just goes black for about 1 second. Sometimes it's worse, sometimes it's better. This footage is from about 10 minutes of gameplay in Sea of Thieves. The LG 34GN850-B is set to 160Hz and G-SYNC is enabled, the game is limited to 144Hz. I have purchased an upgraded DisplayPort cable as I read that it could be caused by the cable not being able to handle the data load, but that was a waste of money as it didn't help. I've tried limiting the game to lower FPS.

CPU: i7-8086K
Graphics Card: Nvidia 3080 Ti Founders Edition FE
RAM: G.Skill Trident Z RGB 16GB 3600Mhz
Motherboard: ASUS Maximus X Hero
Monitor: LG 34GN850-B

Is this a problem with the graphics card or the monitor?

VIDEO LINK -

Joxeon · 20 Aug 2021 at 13:25

Is it the same with Gsync disabled?

Have you updated the Nvidia drivers etc?

Tried it on a different monitor / TV?

Try underclocking the cards core -200 and memory -500 and see if that makes a difference.

Are you using 2 separate cables from the psu to power the GPU?.

takkischitt · 20 Aug 2021 at 14:08

Joxeon said:
Is it the same with Gsync disabled?

Have you updated the Nvidia drivers etc?

Tried it on a different monitor / TV?

Try underclocking the cards core -200 and memory -500 and see if that makes a difference.

Are you using 2 separate cables from the psu to power the GPU?.

Drivers, Windows, etc all up to date.

I've not been able to get another monitor/TV to try, but I may be able to get hold of another ultrawide monitor which also has G-SYNC compatibility to see how that goes, as I want to get as close to my setup as possible.

What would be the best way to underclock the Founders Edition cards?

This is the cable I'm using for power to the card (I had the same issue with the Nvidia supplied lead also) - https://www.moddiy.com/products/Cus...ble-for-NVIDIA-RTX-30-Series-Mini-12-Pin.html

Joxeon · 20 Aug 2021 at 14:16

takkischitt said:
Drivers, Windows, etc all up to date.

I've not been able to get another monitor/TV to try, but I may be able to get hold of another ultrawide monitor which also has G-SYNC compatibility to see how that goes, as I want to get as close to my setup as possible.

What would be the best way to underclock the Founders Edition cards?

This is the cable I'm using for power to the card (I had the same issue with the Nvidia supplied lead also) - https://www.moddiy.com/products/Cus...ble-for-NVIDIA-RTX-30-Series-Mini-12-Pin.html

Does turning off Gsync in the Nvidia control panel make a difference though as that can cause blinking / flickering.

If you install MSI afterburner you can use that to change the core and memory clocks.

takkischitt · 20 Aug 2021 at 15:08

Joxeon said:
Does turning off Gsync in the Nvidia control panel make a difference though as that can cause blinking / flickering.

If you install MSI afterburner you can use that to change the core and memory clocks.

Yeah, it still happens with G-SYNC turned off.

If I underclock it and the problems go, would that be a case of RMAing the 3080 Ti? I wouldn't really be happy using it at a lower spec than what it's meant to be running at/what I paid for tbh.

turbot1984 · 20 Aug 2021 at 15:25

My 3080 crashed yesterday after OC'ing too much, then got flicker after. Unplugged displayport lead, rebooted and flicker disappeared.

takkischitt · 20 Aug 2021 at 15:49

turbot1984 said:
My 3080 crashed yesterday after OC'ing too much, then got flicker after. Unplugged displayport lead, rebooted and flicker disappeared.

So switch off PC, unplug and then plug in the display port cable, then reboot? Was it just the DisplayPort plug at graphics card or did you do the monitor (or both)? I'm willing to try anything at the moment!

turbot1984 · 20 Aug 2021 at 15:55

takkischitt said:
So switch off PC, unplug and then plug in the display port cable, then reboot? Was it just the DisplayPort plug at graphics card or did you do the monitor (or both)? I'm willing to try anything at the moment!

Unplugged at gpu. Oh, I also switched Gsync off then on again in Nvidia control panel. Good luck