Business Desktop dc7600 (Convertible Minitower) 1GB PC2-5300 DDR2 RAM Memory for Compaq Business Desktop dc7600 (Convertible Minitower)-1GB 1024MB 667MHz DDR2-667 PC2-5300 240p DIMM 1.8v. These are usualy used in dual channel please Order Qty 2 for Dual Channel use.