I am reminded of the cursed problem with my previous GPU + motherboard combo where, whenever dynamic power management was enabled on either the GPU *or* the CPU, the GPU would seem to mis-address some memory region or other.

Depending on which driver was used(!) this would result in either a) garbage being displayed on the screen, or b) it writing into the memory of random other processes, breaking them in absurd ways in the process, in the same way that broken RAM would, except it doesn't show up in a memory test!

You can probably imagine how much fun it was to track down and isolate this issue