Corsair CMY32GX3M4A1600C9 Vengeance Pro 32GB (4x8GB) DDR3 1600 MHz (PC3 12800) Desktop 1.5V Density: 32GB (4x8GB). Intel XMP 1.3 Speed: 1600MHz. SPD Speed:1333MHz Tested Latency: 9-9-9-24. Pin Out: 240 Pin Voltage: 1.5V. Compatibility: Intel Z68, Intel Z77 Format: DIMM Memory Type: DDR3; Speed: 1600MHz