jennyh :
Well my G0 Q6600 maxes out at 3.45ghz and not a mhz more. It's not heat or volts (I've had it at 1.58v) it simply will not be stable above 3.45ghz. My mobo isn't the greatest but it's better than any dell.
Just don't be disappointed if your Q6600 doesn't get to 3.6ghz.
Put it this way, if I can get the 6600 (it is G0 stepping BTW) to around 3.4Ghz without any fancy heatsinks and cooling systems, then I am by far more then happy. I also was only planning on OC'ing via a decent program, opposed to doing it via Bios which will always keep it OC'ed. (pointless)
I'm upgrading from a Pentium 4 (so belive me, at stock speeds, the 6600 is by far more then enough for me needs at stock) and only will I OC when I want to play games. (I'm planning on getting a 26" HDTV for my room.)
O, and about the lapping, they said they can lap it within a hour for me, right there. I doubt its a old chip, I will ask them to be sure. But I don't think so, I've been buying from them for years (on most things) any they don't look like the type to shimmy of second hand goods as new.