It seems problem with SiiEx are real. My first mobo (borrowed for review) was great. But my own second has only problems, no data corruption but OCing is poor ... i cannot to realize any high FSB stable at any conditions ... i am moving to eVGA reference board. I had XFX 790 before, but in that time was BIOS P02 and was flaky ... now i hope i can OC my QX9650 at 4GHz with no problem on eVGA