I can't really relate to "how good it might be with a better bios"

I'll agree to the SIIE being quite "sturdy" but far, far from stable when overclocking beyond 1800/450. Bios 0504 and 0507 helped a bit, but eve tried various settings even the "1.6v" ones Elmor posted earlier, and not getting anywhere.

I'm not all pro-ref nv/xfx tho, it has some SPD issues with OCZ DDR3.
At least the overclocking is way easier.