Thats a good selection Atholon, I have the E8400 in my second rig and it works a treat. if its a 6 year old rig hes upgrading he will need a power supply that will support the new hardware
ASUS P5QL PRO LGA 775 Intel P43 ATX Intel Motherboard $86.99
http://www.newegg.com/Product/Produc...82E16813131329
APEVIA WIN-500XSPX 500W ATX12V / EPS12V Power Supply
$44.99
http://www.newegg.com/Product/Produc...82E16817148038