Kingston 4GB (2x2GB) DDR2 PC2-5400 240-Pin FB-DIMM Product Description Kingston memory - 4 GB ( 2 x 2 GB ) - FB-DIMM - DDR IIStorage Capacity 4 GB ( 2 Upgrade Type System specific - NOTE: THIS PRODUCT CANNOT BE SHIPPED TO MASSACHUSETTS OR DISTRICT OF COLUMBIA (WASHINGTON, D.C.) OEM Manufacturer Equivalent Part Number HP EM161AA (x2), HP 397413-B21 Technology DDR II SDRAM Form Factor FB-DIMM Memory Speed 667 MHz Features Fully buffered - WARNING: The solder used in this product contains lead, a chemical known to the State of California to cause birth defects and other reproductive harm. Please wash hands after handling internal components and circuit boards and avoid inhalation of fumes if heating the solder. Manufacturer Warranty Limited lifetime warranty ( Germany, Austria and France - 10 years )