I'm working on 4.0 with my Gigabyte EX58-UD5 and i7 920 It's a little work but I think I can get there Vcore is a little stronger than I would like, but the board has blown me away how graceful and perfect it Overclocks.. I haven't ever really owned a Gigabyte because they always seem to leave out some feautures that I love (esata) but I am absolutely astonished at how much quality this board brings to the table for the price... I suggest this board without reservation for anyone considering an X58 build I will post my settings in the morning...