Product Type: RAM Module Memory Size: 8 GB Memory Technology: DDR3 SDRAM Number of Modules: 2 x 4 GB Memory Speed: 1600 MHz Memory Standard: DDR3-1600/PC3-12800 Error Checking: ECC Signal Processing: Unbuffered CAS Latency: CL9 Number of Pins: 240-pin Form Factor: DIMM 240-pin DIMM DDR3 PC3-12800 CL=9 Dual Ranked Unbuffered ECC DDR3-1600 1.35V 512Meg x 72