I have a 955BE (rev c3 core) that I have OC'd to 3.75ghz on weak water cooling.
Ram 1000 (500 DDR2)
I say weak water cooling because a radiator is all that cools it, the radiator is outside and it's 111F (44c) outside, without trying to "cool" my cpu lol.
Idle at around 43c at night when outside ambient temp is 33c. Much better temps in winter than summer.http://valid.canardpc.com/cache/banner/1268967.png