At www.tigerdirect.com the 920 is $260, the 930 is $330, and the 940 is $450. I was planning to buy the 920, but if there is a large performance gain if I go with the 930, then i'll spend the extra $70. But if there is a huge performance gain i'll go with the 940 even thought its kinda out of my price range. Does anybody know how each of these can overclock to? Like what is the average overclock of these three chips? I'm looking to get 4.5ghz overclock on a dual core. I know the 940 will do it, but do the 920 and 930 have a chance? Thanks for your time.