I would also recommend running it on one memory slot only (do this one by one).
Recently it happened that even a multi-day memtest run did not catch the defect in one of my ram slots.
But when I emptied it, all the gpu driver problems immediately stopped.
The symptom was a crash followed by garbage on screen and a "zzzz" sound. Sometimes followed by a shutdown.
I would also recommend running it on one memory slot only (do this one by one).
Recently it happened that even a multi-day memtest run did not catch the defect in one of my ram slots.
But when I emptied it, all the gpu driver problems immediately stopped.
The symptom was a crash followed by garbage on screen and a "zzzz" sound. Sometimes followed by a shutdown.