Compaq Compatible Part# 287495-B21 - 256MB DDR KIT $38.00 Compaq Compatible Part# 287496-B21 - 512MB DDR KIT $55.00 Compaq Compatible Part# 287497-B21 - 1GB DDR KIT $101.00 Compaq Compatible Part# 301044-B21 - 2GB DDR KIT $199.00 Compaq Compatible Part# 300678-B21 - 512MB DDR KIT $52.00 Compaq Compatible Part# 300679-B21 - 1GB PC2100 DDR ECC REGISTERED $115.00 Compaq Compatible Part# 300680-B21 - 2GB DDR KIT $225.00 Compaq Compatible Part# 300682-B21 - 4GB DDR KIT $450.00 Compaq Compatible Part# 351108-B21 - 512MB DDR KIT $62.00 Compaq Compatible Part# 351109-B21 - 1GB DDR KIT $95.00