Max BCLK i tested was 220 but i dont tested the stability (1.235v QPI/VTT)
http://img381.imageshack.us/img381/7872/220tj8.jpg
i only run about 10 minuts prime small & Blend , then i stop the test!
but with te previous F3 bios for 4Ghz i needed to use 200x20 @ 1.344v and 3.8ghz @ 1.27v (200x19)
But now the new F4K bios Turbo Option always set multi x21 (not only in single app like F3 bios ) , and now i can run 4Ghz (191x21 @ Turbo) with 1.27v
and for 3.8Ghz with F4K bios i only need 1.20v (200x19)
http://img87.imageshack.us/img87/9391/3800120vev4.jpg
Try the new F4 bios (F4K for UD5 & F4J for Extreme) , now you can use Turbo Option always with Multi x21
regards
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