I just want to buy a new comp and i found an Amd Athlon 64 3800+ Dual core socket 939.When i went to a the shop to order the stuff he told me that i should get a 940 CPU.so i found the same Cpu but with 940 socket but when i tried to find a 940 socket motherboard a couldnt and it was only AM2.Is Am2 and 940 sockets the same? plz help me