What is your ambient, and which cooler do you have? My previous CPU was a Q6600 G0, and I've tested, overclocked and calibrated many others.
Most Q6600 G0's can reach 3.6 stable on high-end air, as long as they're not above 1.3 VID, which requires 1.440 Vcore in CPU-Z while under 100% workload with Prime95 Small FFT's.
It's OK to push your temps to "Warm" on the Scale shown above, since your temps will never reach that high under any games or apps.