I don't feel myself confident with flaky hardware. I'm using UPS and ECC, so I can be sure that no bugs are introduced by hardware issues. I would love to use GPU with ECC, but they are ridiculously priced, so I'm out of luck.

That's not a real need, of course, it's just some kind of whim, but if I can pay for it, why not. Just like those crazy overclocker dudes pay for their whims.