. I still own the Q6600 (over 7 years old now) and it can still put 3.6ghz overclocks on a P35-DQ6 board.
did you ever passmark test that chip overclocked? I never did the Q6600 (I was on AMD platforms at the time) but now I've ended up with a few recycled core2 systems, all OEM (so no overclocking). I have a Q6600 on my desk and I'm wondering if I should hang onto it in case I ever come across a 775 board I can overclock or if I should just dump it on ebay.
It would be a system for a family member so I usually hesitate from overclocking those but I hear such good things about the core2quads.