310479-B21 I GENUINE HP 256MB DDR SDRAM Memory Module AA655A BRAND NEWTechnical Information Memory Size 256 MB Memory Technology DDR SDRAM Memory Speed 266 MHz Memory Standard DDR266 PC2100 Error Checking ECC Signal Processing Registered Physical Characteristics Number of Pins 184 pin 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 stated. If you are have questions