I'm currently using an AC Freezer 7 to cool my Q6600 and at stock speeds it is absolutely fine. However, I've managed to get it running stable at 3.15ghz (B3 stepping) but the Freezer 7 isn't keeping up.

I can get a Thermalright Ultra 120 (not Extreme) in my local Novatech for £26. Does anyone have one and is it a worthwhile upgrade compared to the Freezer7?

The Artic does tend to struggle with clocked quads so the Ultra 120 is the better option - Clicky

Turns out, the Ultra 120 won't fit in a TT armour with the big side-fan - its just a little too tall. Oh well. Have set it back to stock speeds now anyway.