G.SKILL Ripjaws Z Series 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 2133 (PC3 17000) Desktop Memory Model F3-2133C9Q-16GZH Cas Latency: 9 Voltage: 1.6V Multi-channel Kit: Quad Channel Kit Timing: 9-11-11-31 Buffered/Registered: Unbuffered Features: Quad channel memory optimized for Intel Core i7 processor family for Socket LGA-2011 and X79 platform Compatible with Intel dual channel systems Intel XMP support for 2nd,3rd and 4th Generation Intel Core Processors