AMD

x260 r7 cards were known to have BIOS issues that caused crashing, the best solution found for this seems to be custom flashing the last Sapphire x260 r7 bios on to the card even if its not a Sapphire brand, " warning " if you mess that up your card may be a paper weight

Artifacting on RX 400 and RX 500 series cards can sometimes pinpoint which memory channel is bad. This video demonstrates the exact issue and potential fix: https://www.youtube.com/watch?v=VWDYmCmIde4