This Apple Computer MF622G/A compatible factory original 16GB DDR3-1866MHz single rank 1.5V RDIMM is 100% guaranteed to be compatible with your system and to work right the first time. Adding additional memory is the best way to increase the performance of your system. All our memory is built to strict JEDEC standards to meet or exceed the Tier 1 OEM's factory requirements. Our products are also guaranteed by the Magnuson-Moss Warranty Act to not affect or void OEM warranties.

• DIMM 16 GB capacity is enough to execute all memory hungry programs simultaneously
• 240-pin-pin DDR3 SDRAM interface synchronizes electrical and clock signals for an efficient data transfer rate
• Up to 1866 MHz speed with Registered signal for playing the latest games and using heavy software