Komputerbay 16GB (4 X 4GB) DDR2 DIMM (240 pin) 800MHZ PC2-6400 PC2-6300 16 GB KIT with Crown Series Heatspreaders for extra Cooling CL 5-5-5-12 Komputerbay 16GB (4 X 4GB) DDR2 DIMM (240 pin) 800MHZ PC2-6400 PC2-6300 16 GB KIT with Crown Series Heatspreaders for extra Cooling CL 5-5-5-12 CL 5-5-5-12 Voltage 1.8V Dimensions of memory (mm: 53.975 x 7.62 x 133.35) (inches: 2.125 x 0.3 x 5.25) Well tested. Non-ECC. Non-parity Lifetime Warranty