Komputerbay 16GB (4 X 4GB) DDR3 DIMM (240 pin) 1600Mhz PC3 12800 16 GB KIT 9-9-9-25 with Crown Series Heatspreaders for extra Cooling Komputerbay 16GB (4 X 4GB) DDR3 DIMM (240 pin) 1600Mhz PC3 12800 16 GB KIT 9-9-9-25 with Crown Series Heatspreaders for extra Cooling CL 9-9-9-25 Voltage 1.5V Well Tested. Non-ECC Non parity Voltage 1.5V, XMP ready 100% Tested and Verified