I still have a couple of socket A systems alive and well. One is a Barton core 3200 one of the last made with the unlocked multiplyer. The other in my sons computer is a 2800 Barton also with the unlocked mult. Surprisingly enough they both run really well. My 3200 runs almost as well as the girl freinds 64 bit 3500. The 2800 is not far behind. Puterfixer said it all. My new build was going to based on the AM2 but I had Alot of Corsair XMS DDR1 ram and got good buys on parts for a 939 X2 system, so thats what I built. I am not disapointed with my choice as its runs much better than I expected.