I'm using 5/08 offisial BIOS, and it is working fine with w3520.
I was thinking about SW/driver-problems the other day (after your system passed the memetest), because it had already passed prime95 too. I have seen many BSOD while OCing on a unstable i7-system, but not many errors. An instable i7 would BSOD on you.
If you can pass prime95 and memtest stability tests, and your daily application runs without problems, then you shouldn't care much about Superpi-errors, would i suggest.
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