I use a socket 939 rig, Dual core Opteron (stock 2.1GHz, I think its at 2.5 or 2.6 right now but during the winter I do 2.7), 2x1gb of G.Skill DDR500 HZs (very nice sticks
), and a single 8800gt.Socket 939 is basically the same as AM2, minus one extra pin on AM2 to allow the use of DDR2. If they made 2gb non-ECC ram modules of DDR1, I would have some, but they don't. The memory controller of s939 processors also doesn't like using 4 sticks of ram, but I'm thinking of adding another 2gb of ram before I get a whole new rig.
I could also use an extra SATA hard drive if anybody has one
.