Silicon Power 8GB (2 x 4GB) 240-Pin DDR3 UDIMM 1866HMz (PC3 14900) C9 Memory Kit (SP008GXLYU18ANDA) Density: 8GB (2x4GB) Speed: 1866MHz Tested Latency: 9-11-9-27 Voltage: 1.5V Format: UDIMM Pin Out: 240 Pin Warranty: Lifetime Warranty