G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 2133 (PC3 17000) Desktop Memory Model F3-2133C9D-8GXL Cas Latency: 9 Voltage: 1.6V -1.65V Multi-channel Kit: Dual Channel Kit Timing: 9-11-11-31 Buffered/Registered: Unbuffered Heat Spreader: Yes Features: Compatible with Intel LGA1155 and LGA1150 platforms Intel XMP support for 2nd,3rd and 4th Generation Intel Core Processors To reach rated memory speed, enabling Intel XMP profile or manual BIOS tuning is required Combination with other memory kits or modules (even with same model number) is not recommended to avoid any compatibility issues