...maybe SATA hub to me.
I tell you, I had an EVGA Classified that ran perfectly for 2 years andd then one day.......it started throwing errors all over the place. It wouldn't report memory correctly and the thing would just blue screen for no reason.
I took each component out and tested them in a different X58 board and they were all fine.
So sure a board can belly up at any time. I'm not convinced it's your board though.....but I don't think we got the whole story....so..... good luck with your problem.
I think you may possibly be on to something there... I think the SATA hub was the problem with my 680i. It would definitely be worth looking into, but how could you rule it out?