I recently upgraded my monitor which allowed me to gain more than 30 FPS @ 4K. I was elated, I could finally put my EVGA RTX 3090 FTW3 ULTRA to the test, playing WWZ and AOE4 and the such.

But, if I run my games above 30 FPS, the games eventually crash. And after they crash once, they crash a lot faster once I restart them. I thought maybe it's a heat issue, but playing WWZ @ 60 Hz barely challenges the GPU, which just runs at about 30% of it's max.

I've upgraded the firmware on my GPU (to see if it would fix things), the bios on my motherboard is up to date, using the latest NVidia drivers, I have a high quality VESA certified DP cable (1.4), I am not overclocking my CPU or my GPU, I've had steam check all the game files.... I turned off HDR as well. My monitor is a Gigabyte M32U, and I turned off adaptive sync on it (just in case).

At 30 FPS, games run fine, they never crash. But the moment I run my games above 30 FPS, after a bit of time playing (15-30 minutes, sometimes 1 hour), the game craps out. When this happens, I can't even ALT-TAB out to other windows on my desktop, I have to sign out and sign back in to return to my desktop. What can I do? This is frustrating? Is the EVGA RTX 3090 FTW3 Ultra bad? (already RMA'd the original one because it died hard, not even sure if I can RMA the new'ish one).

Anyone seen this before? 

I'd like you to please post all of your system specs to include make and model of PSU. 

@rjohnson11

System specs are:

Gigabyte Aorus Elite X570
Ryzen 9 5900X (not overclocked)
EVGA RTX 3090 FTW3 Ultra (not overclocked)
G-Skillz Ripshaw 2x16Gb DDR4
1Tb ssd m.2
Gigabyte M32U monitor
Corsair RM850 power supply
Arctic Liquid Freezer II 240

The crashes happen even when the GPU isn't working very had (i.e. when I set WWZ to just 60 FPS, the GPU hovers between 27 to 30% load only, but I eventually still suffer crashes at some point). At 30 FPS (i.e. when I was using a monitor that was 30 Hz @ 4k only), the GPU never game me issues. If I force WWZ (or other games) to 30 Hz, I have no issues.