There is a G0 stepping for the Q6600. Good choice on CPU. The main purpose is to get a much more powerful processor than you paid for, or with the best equipment see how much performance you can possibly squeeze out. For example, going for the Q6600 for $290, which is a 2.4ghz processor and were able to achieve a stable overclock at 3.0ghz the chip would be the equivalent of a QX6850 processor at stock speeds, which costs around $1000.