EDGE 2GB DDR2 SDRAM Memory Module - For Desktop PC - 2 GB (1 x 2GB) - DDR2-667/PC2-5300 DDR2 SDRAM - 667 MHz - ECC - Registered - 240-pin - DIMM - Lifetime Warranty

Up to 667 MHz speed with Registered signal is enough to run heavy software smoothly while surfing web with dozens of tabs open DIMM 2 GB memory allows you to have more programs open at a time 240-pin-pin DDR2 SDRAM operates at up to 400 MHz data bus speed with minimal power consumption and as a result, you get optimal computer performance with an improved memory heat dissipation