Corsair Vengeance Pro Series Red 8GB (2x4GB) DDR3 1866 MHZ (PC3 15000) Desktop Memory Density: 8GB (2x4GB) Speed: 1866MHz Tested Latency: 9-10-9-27 Voltage: 1.5V Format: DIMM Pin Out: 240 Pin Limited Lifetime Warranty. Memory Type: DDR3; Speed: 1866MHz