Patriot Intel Extreme Masters Viper 3 Series DDR3 16GB (4 x 4GB) 1866MHz Quad Kit (PC3 15000) 240-Pin NON-ECC UDIMM Memory PVI316G186C9QK Capacity: 16GB (4 x 4GB) Quad Kit 240-Pin NON-ECC UDIMM Voltage: 1.5V Frequency: PC3-15000 (1866MHz) Timings: 9-10-9-27 Intended for all DDR3 platforms Feature Overclock: XMP Certified (Version 1.3)