It's pretty easy for those to be race conditions, too. Plenty of one time crashes in a fleet of thousands of machines with ECC. ECC lets you know it's almost certainly not a memory issue.

10% more fps doesn't matter at 150 fps, but it's nice when your FPS is lower. 60 -> 66 might mean you don't dip below 60 as often. 55 -> 60.5 is pretty nice too. Maybe less of a deal if you've got VRR etc.