Ok im purchasing an amd athlon 64 3200+ socket 939 and i just need to know what motherboards i can use

correction sry its 3500+

go to newegg.com, go under the AMD compatible motherboards, and put in the stuff you want, PCIe16, etc. If i were you, i would go with an ASUS or a BIOSTAR motherboard, they generallly make good, solid, stable, and if you like ocing, they generally are pretty good at that.