This singlehandedly almost and should have killed my startup. And the problem was so evil.. not all mainboards got it at the same time.. it was a bell curve distribution, and it started with simple lockups that a reboot could fix (which required a customer service trip). Then the lockups would increase with frequency until it no longer turned on, at which point my company had to replace it with a new mainboard and sometimes chassis for free.

Worst 4 years of my life.