I saw a post on another forum (http://www.overclock.net/intel-cpus/...nm-friend.html) about overclocking an e5630. I think I recall that person saying he had to get a custom Bios from EVGA to run the cpu? Maybe a bios has been released since then that supports these Xeon e5600's, also Gigabyte boards seem to run the x5600's OK so they should run the e5600's no problems.

Anyways, for the money and Vcore (average, nothing special) it took for 4.2GHz in that post i'd just look at getting an i7-930. *edit, in less your set on an SR-2 in which case this would be OK, just don't expect record setting clocks (3.8 - 4.0 should be reasonable.)