New PC build; is my GPU faulty?

[gumballmachineweekend]

MSI B450M Mortar Max

Ryzen 5 3600

MSI RX 5700 MECH OC

Coolermaster MWE 600W White 230V V2

Team T-Force DD4 16GB 3200 CL16

 

Scenario: Just built a new rig for gaming. After a few moments of normal usage, programs in windows appear entirely as black windows. They are responsive and I can click and interact with things normally within them, but they appear completely black. This has happened so far with Chrome, Steam, and discord.
Photos: 1 2

Additionally, when playing Resident Evil 2 remake (the only game I've extensively played), the game has crashed on at least 3 or 4 occasions with the "Fatal application error / The GPU device instance has been suspended"
Photo: 1

Things I've tried:
-Ran memtest86+ with no errors (2 passes)
-Underclocked the MSI factory OC from 1750 MHz to 1465 MHz (MSI afterburner)
-Rolled back AMD gpu drivers with DDU (20.4.1 -> 20.2.2)
-Tested GPU memory with OCCT's GPU memtest - This crashed and rebooted the PC the first time. I ran it two subsequent times for 3-4 minutes with no errors on each.
-Ran Video Memory Stress Test with no errors
-Furmark for around 2-3 minutes
-Ran 3DMark's Time Spy and looped Fire Strike for around an hour; no errors.
-Finally, I did a fresh install of Windows. The problem still persists.

At this point, the only other thing I can think of is testing the GPU in the second PCIe slot. I'd test it with another GPU but I don't have any other right now. BIOS is up to date. I'm inclined on just RMAing the damn thing. Any pointers? Thanks so much for any help.

[Perrin]

Yeah try it in the other pcie slot. You could just have a faulty slot. If you have another pc or have a friend with a pc, put your GPU in the other computer and see if that works too.

[Technane]

Or you could not have enough PCIE lanes ? what are you using for storage? 

[gumballmachineweekend]

2 minutes ago, Technane said:

Or you could not have enough PCIE lanes ? what are you using for storage? 

Hey, thanks for the response. Bit of an update: I tried the card on the second PCIe slot, but I can't get any signal. I read somewhere that switching to UEFI in BIOS would help, but it was still a no go.

Also, I tried updating BIOS and chipset drivers just in case, but that didn't work.

Storage: Toshiba RC500 M.2 2280 500GB and 2TB Seagate Barracuda

[Technane]

Ah exactly what i was thinking, Check in the manual about disabled PCIE lanes while using M.2 

[gumballmachineweekend]

Technane, thanks so much for your advice. I was able to get the second PCIe slot working after that, but anyway, the issue still persists. So I suppose the GPU is probably at fault right? I'm not sure. Guess I'll just ask MSI. Thanks!