Industry standard PC2-3200 240-pin DDR2 400MHz CL3 DIMM. This desktop memory is compatible with most PC's, and carries a Lifetime Warranty. DDR2 is the next-generation evolution of DDR memory technology. DDR2 memory features faster speeds, higher data bandwidths, lower power consumption and enhanced thermal performance. (It is NOT backward compatible with first generation DDR - due to different connector pins.) DDR2 memory modules have a different notch than the same-sized DDR modules, to prevent inaccurate insertion. Give your computer a boost by adding more memory! PC Compatible, 1.8 Volts operation, reducing power consumption by about 50 percent, Guaranteed Compatible, Lifetime Warranty, All modules labeled with manufactures telephone number for direct support, Made in the USA. Add-On Computer has over 12 years experience in the Digital Flash Storage and Memory Module market and is a leading supplier of memory module solutions to consumers and resellers. Add-On computer is the exclusive supplier to Ingram Micro's "Memory Upgrades" program for the last 5 years. Our main mission is to bring quality products with experienced and expert advice to our customers. All Add-On Computer products are quality tested for performance and 100% compatibility. All Add-On Computer products are backed by a warranty. Add-On to Your Business