4GB Crucial DDR3 SO DIMM 1600MHz PC3 12800 CL11 Memory Module by Crucial

Enhance the performance of your iMac 27" late 2012 or MacBook Pro mid 2012 with 4GB Crucial DDR3 SO DIMM memory module. It has 1600MHz memory speed.  This dual-rank memory module kit increases your computer's RAM, enabling more applications to run simultaneously without system glitches. The non-ECC unbuffered DDR3 PC3-12800 RAM memory module features a 1600 MHz clock speed, a CAS latency of 11, and a power rating of 1.35/1.5V. To use this module, your system must have both a 204-pin SO-DIMM slot and a DDR3-enabled chip.