8GB 2x 4gb DDR2 PC2-5300 RDIMM IBM System x3950 M2 7141, 7233-xxx Memory RAM | eBay
HP 395547-001 4Gb 1 X 4Gb 333Mhz Pc2700 Ecc Registered Ddr Sdram 184Pin Dimm | eBay
Bewinner 1PCS Memory RAM DDR2 4GB, 4GB Large Capacity DDR2 800Mhz Memory Module,Designed for AMD,Adopting 240Pin to Achieve High Anti-Interference and Antistatic Properties,Plug and Play at Amazon.com
Kingston 4 GB (2x2GB Kit) Fully Buffered ECC DDR2 SDRAM Memory Module 4 GB 333MHz DDR2667/PC25300 DDR2 SDRAM 240pin DIMM KTM5780/4G Server Memory Only at Amazon.com