Update: I dropped the memory clock by ~300 in EVGA precision and it seems to introduce enough stability to get most stress tests working properly, at least. Furmark will now run without artifacts and Heaven Benchmark displays no more artifacts. Lightroom runs properly without crashing. Does that point to an issue with the stock overclock? Could it still be PSU or something else, or is this almost certainly a GPU issue at this point?

First off, the important parts (probably):

• 1000W PSU
• EVGA GeForce RTX 2080 FTW3 GPU - 100% stock, factory OC
• Windows 10
• Newest Nvidia Drivers

A few months back - in July - I picked up a B-stock RTX 2080 from EVGA - everything has been fine with daily use for quite a while now, but suddenly, stuff is starting to go wacky.

It started with Metro Exodus - I was able to crank all the settings up to high, but I started getting lockups and crashes (although, for the most part, it was doing fine).

Suddenly, I started being unable to even start the game. Now, I can barely operate in something as silly as Lightroom without my whole PC giving me all sorts of weird graphical errors.

What I've done to troubleshoot so far - Check all connections - both 8pins from PSU, plus connection into PC from GPU. Check power cords, make sure BIOS is reporting proper voltages from PSU. Checked fans to make sure they're not blocked, checked to make sure that they're turning on properly. DDU-uninstalled drivers, reinstalled fresh. Checked GPU temps in GPU-Z (Stable at 35c idle, 65ish under load.)

I've also run a bevy of GPU stress tests - Furmark runs fine at 4k, but inexplicably throws out artifacts under 4k (1080 gives plenty). Unigine Heaven throws out artifacts the whole time. Little sparkles of color with occasional complete failures of the GPU drivers (black screen, freeze, until they restart).

I'm within RMA period, although I'll have to pay for return shipping. I'd like to avoid that, but I feel like I'm out of options. Figured I'd drop by here in case there's anything stupid I may have missed.

Thanks ahead of time!