Kingston Technology 1 GB DDR2 Cl6 DIMM Memory 2 800 MHz (PC2 6400) 240-Pin SDRAM Single (Not a kit) KTD-DM8400C6/1G at Amazon.com
Zopsc DDR2 4GB RAM 800MHz Memory Module for AMD CPU Stable Fast Data Transmission 240PIN for High Anti-Interference and Antistatic for Desktop Computer, Plug and Play