I am becoming desperate and starting to consider RMA. It has been super frustrating paying 1300 EUR for a card that does not work and still have to jump through lots of hoops to get what I paid for.

Under GPU load, the system suddenly:

• goes to black screen
• GPU fans ramp to 100%
• sometimes sound continues briefly
• GPU is at 98% and 99% load when it happens.
• requires restart
• Normal load and medium load does not cause the issue

It happens in:

• 3DMark Time Spy (sometimes within 3 seconds)
• Red Dead Redemption 2, REANIMAL, and others.

My System

• AMD Ryzen 7 9800X3D
• Pure Power 12 M 1000W
• ASRock B850 Pro RS
• RTX 5080 Inno 3D 3X

I have tried:

• BIOS updated to newest version
• DDU clean driver reinstall
• PCIe Gen4 instead of Gen5
• Disabled G-Sync and messing with game settings
• Tried different refresh rates
• Power limit reductions (through Nvidia and MSI afterburner)
• Reseated GPU and cable
• Switched from native 600W cable to included nvidia adapter + PCIe cables
• Upgraded to new motherboard and new CPU and issue still persists
• Undervolting attenuates but does not fix

At this point, does this sound like a faulty GPU, or is there anything else realistic I should test first?