Kingston Technology 4GB Kit (2x2 GB) 400MHz DDR2 PC2-3200 240-Pin Dual Rank Chipkill DIMM Memory for Select IBM Servers KTM2865/4G at Amazon.com
CMS 16GB (4X4GB) DDR2 3200 400MHZ ECC Registered DIMM Memory Ram Upgrade Compatible with IBM® Intellistation Z Pro (6223-Xxx) Dual Rank for Server Only - B48 at Amazon.com