I haven't voted since this is 790i but my 780i corrupted HD [WD?] and hence OS after plus 470FSB oc'ing with DDR2 MEM under 650 always, so I'm not sure you can say it's a problem restricted to only 790i. I have a dual boot with Ubuntu 64b, 64b is always more vigilant to catching MEM errors so I try it. I just booted the Ubuntu install after I felt the errors were being caused with very heavy fragmentation and it showed all the offsets which were corrupted at boot and when booting Windows again, the drive kept needing Checkdisk to fix physical errors. SATA II drive, E8400, S2F. CPU/MEM can do these settings easily though and they seemed fine on the S2F until I rebooted.
You'd have to test very accurately to determine any corruption at low and stable settings, for a first, you'd have to know the state of hardware and OS right before the "corruption inducing" tests.