Komputerbay 4GB (2 X 2GB) DDR2 DIMM (240 pin) 1066MHz PC2-8500 Desktop RAM with Red Heatspreaders for extra cooling CL 5-7-7-25 Komputerbay 4GB (2 X 2GB) DDR2 DIMM (240 pin) 1066MHz PC2-8500 Desktop RAM with Red Heatspreaders for extra cooling CL 5-7-7-25 CL 5-7-7-25 Voltage 1.8V Well tested. Non-ECC. Non-parity Lifetime Warranty