Kingston KVR800D2N5K2/4G DDR2-800 4GB Memory Kit at Amazon.com
Kingston 4GB Memory Module 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 at Amazon.com
Best Buy: Kingston Technology 4GB DDR2 SDRAM Memory Module KTA-MB667K2/4G