Silicon Power 8GB Kit DDR3-1600 MT/s 204 Pin Dual 1.35V/1.5V SODIMM Notebook Memory SP008GLSTU160N22 8GB Kit (4GBx2) Standard: DDR3L 1600 (PC3L 12800) Cas Latency 11 1.35V (Low Voltage) 100% Tested Laptop Use Increases system performance Compatible with select Mac systems. Verify model for compatibility