KOMPUTERBAY 4GB 2x 2GB DDR 400 MHz PC3200 4 GB DIMM CL3 184pin ECC REGISTERED for servers not desktops Capacity: 4GB (2x2GB) DLL aligns DQ and DQS transition with CK transition Well Tested. ECC REGISTERED Lifetime Warranty Programmable Burst Length 2 / 4 / 8 with both sequential and interleave mode