guys pls help something is very wrong with my used RTX 3080. Games show colroed checkerboard squares after a driver upadte:

the desktop looks fine. it only appears under load. ive already reinstalled the driver. whats the right order of tests before I panic?
Temperatures in the overlay don't look crazy to me, but I'm not sure which sensor matters. I'd love to rule out the simple stuff before contacting support.