Memory Master 4 GB (2 x 2GB) DDR2 800 MHz PC2-6400 Desktop DIMM Memory Modules MMD4096KD2-800 at Amazon.com
4GB [2x2GB] DDR2-667 (PC2-5300) RAM Memory Upgrade Kit for The Apple iMac 7,1 (20-inch, 2.0GHz, MA876LL/A) Intel Core 2 Duo (Genuine A-Tech Brand) at Amazon.com
Yunir PC2-6400 DDR2 4GB 800MHz 1.8V 240 PIN Desktop Computer Memory RAM Module High Speed Data Transmission for AMD at Amazon.com
OFFTEK 4GB Replacement Memory RAM Upgrade for Asus P4-P5N9300 (DDR2-5300 - Non-ECC) Desktop Memory at Amazon.com