3.4Ghz stock speed. Just do some research and get a good heatsink and fan. There is ZERO NEED TO WATER COOL (at this point.)

As far as 'danger', only worry about it if your temperatures get really high.

By the way, as stated in sig: 920@3.5Ghz, haven't fiddled with it much, ON AIR. (stock speed 2.66)