Apple 4GB 1866MHz DDR3 ECC SDRAM DIMM Memory Module MF623G/A
The Apple Memory Module features a capacity of 4GB that boosts your system performance. The DDR3 technology in this module is engineered to deliver fast and reliable performance. This module operates at a frequency of 1866 MHz that increases data transfer in your processor. This RAM comes with a dual-in-line memory module.