To keep the prices down, AMD has made a 64-bit Sempron on the 754 motherboard.... wanna look at one? Whats your total amount that u can spend? Here is a link to the 64 Semprons... AMD Sempron 64 Here is a link to the AMD 64-bit... AMD Athlon 64 (Socket 754) A motherboard for the 754 cpu... it includes the firewire, DDR 400, and a NForce 3 250gb NorthBridge... Abit NF8 ATX AMD MotherBoard