Corsair CMY8GX3M2B2133C11 Vengeance Pro Series 8GB (2 x 4GB) DDR3 DRAM 2133MHz C11 Memory Kit 1.5V Built for overclocking: Each Vengeance Pro Series module is built from an eight-layer PCB and highly-screened memory ICs. The efficient heat spreader provides effective cooling to improve overclocking potential. The heat spreader doesn't just allow Vengeance Pro Series to run better - the aggressive yet refined form factor looks great in showcase systems. The color accent clip lets you match your Vengeance Pro Series memory to your system's color scheme. Performance and Compatibility: Vengeance Pro Series memory is optimized for performance on the latest 3rd and 4th generation Intel Core platforms. XMP 1.3 profile support makes stable overclocking easy and automatic. Perfect size: The Vengeance Pro Series module height is carefully designed to fit easily in most system while still providing ample cooling performance and that edgy look. Memory Type: DDR3; Speed: 2133MHz