Corsair CMY16GX3M2B2133C11 Vengeance Pro 16GB (2x8GB) DDR3 DRAM 2133MHz (PC3 17000) C11 Memory Kit - Black 1.5V 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. 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. 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. SPD Speed: 1333MHz. Speed Rating- PC3-17066 (2133MHz) Memory Type: DDR3; Speed: 2133MHz