I've been up to 4.1GHz 1.4v on air and haven't tried for more.
I've got an old 920, not the latest stepping.
I may toy around with it a bit more. I haven't spent a lot of time going for max.
__________________Intel Core i7 920 @ 3.96GHz (1.36v)|Mushkin 998681 XP3-12800 (3x2GB)
ASUS TUF Sabertooth (X58)|ASUS GTX 580 DirectCU II (980|4604)|ASUS PA246Q
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