Business Desktop dc7800 Convertible Minitower 2GB PC2-5300 DDR2 Memory for Compaq Business Desktop dc7800 Convertible Minitower RAM-2048MB-667MHz DDR2-667 PC2-5300 240p DIMM 1.8v. Price single 2gb stick. Buy and install in matching pairs for a pair kit please buy two two pcs.Code (K-500)