PNY XLR8 16GB (4 x 4GB) DDR3 2133MHz (PC 17000) 240-pin CAS CL 10 Desktop Memory Kit- MD16384K4D3-2133-X10 Overclocked-Boasting lightening -fast speeds of 2133MHz and low latencies to meet the demanding needs of hard core gamers and enthusiasts Custom heat sink featuring cooling fins for superior heat extraction for enhanced reliability and endurance for high stress gaming and overclock conditions Channel: Quad Latency: CAS 10 Speed: 2133 MHz Type: DDR3 Desktop Pin Out: 240-pin Lifetime Warranty & Free 24-7 Technical Support