Crucial 8GB Single DDR2 667MHz (PC2-5300) CL5 Fully Buffered ECC FBDIMM 240-Pin Server Memory CT102472AF667 at Amazon.com
IBM 8GB DDR2 SDRAM Memory Module - 8GB (2 x 4GB) - 667MHz DDR2-667/PC2-5300 - ECC - DDR2 SDRAM - 240-Pin DIMM at Amazon.com
A-Tech 8GB KIT (4 x 2GB) for Dell Optiplex 740 745c 755 DT/MT/SFF 760 DT/MT/SFF 760 Series (Desktop Mini Tower and Small Form Factor) DIMM DDR2 Non-ECC PC2-6400 800MHz RAM Memory at
Kingston 8 GB Kit (2 x 4 GB) 667MHz DDR2 Server Memory KTD-WS667/8G at Amazon.com