OWC 64.0GB (8 x 8GB) PC6400 DDR2 ECC 800MHz 240-Pin... at MacSales.com
4GB 2X 2GB Kit DDR2 PC6400 LOW DENSITY PC2-6400 800MHz Desktop Memory 240Pin New | eBay
Pair of Super Talent DDR2 DDR2 Memory (T800UB1GC5) PC6400 | eBay
CMS 2GB (2X1GB) DDR2 6400 800MHZ ECC Non Registered DIMM Memory Ram Upgrade Compatible with HP/Compaq® Proliant Dl120 G5 Ecc Ddr2-Pc6400 for Server Only - B72 at Amazon.com