It's air-cooled using a ThermalRight Ultra 120 Extreme HS with a Scythe SFF12F 120mm (very quiet) fan. I used Arctic Silver for paste. No lapping or extra work involved. I'm running the G0 at near-stock voltage (1.325V) and did not have to change or alter anything else -- NB, FSB, etc.What are you using for cooling on the Q6600 to keep it stable at that speed?
What sort of temps are you getting idle and under load? as I might pick one up when they are back in stock.