MemoryMasters 4GB 800MHz DDR2 (PC2-6400) - 2x2GB SO-DIMMs for Apple iMac Intel Core 2 Duo Early 2008 20 inch 24 inch and White MacBook Mid 2009 13 inch 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
TECMIYO DDR2 PC2-6400 DDR2 800 4GB Kit (2x2GB) Non ECC Unbuffered 1.8V CL6 200-Pin Sodimm Laptop Memory Module at Amazon.com
8GB 2x 4GB DDR2 PC2-6400 800MHz 200 pin SODIMM Memory RAM for Sony Vaio SR Series VGN-SR (PARTS-QUICK BRAND) at Amazon.com