Crucial 8GB Single DDR2 667MHz (PC2-5300) CL5 Fully Buffered ECC FBDIMM 240-Pin Server Memory CT102472AF667 at Amazon.com
8GB [2x4GB] DDR3-1066 (PC3-8500) ECC RAM Memory Upgrade Kit for The Apple Mac Pro Quad-Core 2.66GHz 1TB 2.66GHz 1024GB (Z0G1-2.66-8GB-1TB) (Genuine A-Tech Brand) at Amazon.com
Komputerbay 16GB Dual Channel Kit 2X 8GB 204pin DDR3-1066 SO-DIMM 1066 PC3-8500 (1066MHz, CL7) for Apple at Amazon.com
Komputerbay 8GB (2 X 4GB) DDR2 DIMM (240 pin) 800MHZ PC2-6400 PC2-6300 Desktop RAM with Red Heatspreaderss for Extra Cooling CL 5-5-5-12 at Amazon .com
IBM 8GB 1X8GB 4RX8 PC3-8500-CL7ECC DDR3 1066VLP RDIMM 8 DDR2 1066 PC2 8500 Internal Memory 46C7499 at Amazon.com