Crucial 8GB DDR3 SDRAM Memory Module - 8 GB (2 x 4 GB) - DDR3 SDRAM - 1866 MHz DDR3-1866/PC3-14900 - 1.35 V - Non-ECC - Unbuffered - 240-pin - DIMMMemory Size: 8 GBMemory Technology: DDR3 SDRAMMemory Voltage: 1.35 VNumber of Modules: 2 x 4 GBMemory Speed: 1866 MHzMemory Standard: DDR3-1866/PC3-14900Error Checking: Non-ECCSignal Processing: UnbufferedCAS Latency: CL13Number of Pins: 240-pinForm Factor: DIMM