497765-B21 I GENUINE HP 4GB DDR2 SDRAM Memory Module 4GB (2 x 2GB) 501157-001Technical Information Memory Size 4 GB Memory Technology DDR2 SDRAM Number of Modules 2 x 2 GB Memory Speed 800 MHz Memory Standard DDR2 800 PC2 6400 Signal Processing Registered Physical Characteristics Number of Pins 240 pin Form Factor DIMM We ship all products according to manufacturer specifications. If the manufacturer does not include an option as standard with the product (power supply, fan tray etc) we do not either unless specifically