ok, so as you know we're looking at a huge $700 difference here.. i dont know if the price difference is worth it. what would you guys do? i hear the q6600 is easily overclockable to 3ghz on air. but is that without the hassle of messing with voltage? since the multiplier is locked, has anyone run into issues when increasing the fsb speed? also, how much can i overclock the 6850 without some crazy cooling system and voltage tinkering?
You spend an additional 700 USD on three things: guaranteed better overclockability , unlocked multiplier, and warranty. If you OC Q6600 to 3.0Ghz, you void your warranty.