Some update: At settings that caused the use of "sfc /scannow" command to show system files corrupted using ASUS Striker II Extreme fails to boot on the EVGA 790i Ultra motherboard. So basically settings that are stable/POSTs on the EVGA will not cause corruption on the S2E.

Also altering the BIOS in the S2E from unstable to a stable setting, or even changing the CPU(e.g. from QX9650 to E8400) and run again "sfc /scannow, would return a "no corruption" result, right after a "corruption found" with prior "unstable" settings.

Seems that with some unstable settings "sfc /scannow" wrongly finds corrupted files, but actually the files are fine, and simply reverting back to stable settings get the "sfc" to scan and report correctly again...

An intriguing finding, and may not reflect on everyone's hardware.

seems that I have been reinstalling (right after an unsuccessful "sfc" scan) windows when there is no corruption!