Komputerbay 32GB (4x 8GB) PC3-12800 1600MHz SODIMM 204-Pin Laptop Memory 10-10-10-27 for PC only - not MAC This Memory will not work in Apple Mac computers - only in PC (Sony/Dell/HP/Compaq/ASUS/Lenovo/IBM/MSI/etc.) with Intel or AMD Processors. If you need Mac Memory - please refer to ASIN: B009GYVLGS Well Tested. Non-ECC Non parity Unbuffered Voltage 1.5V. Gold Leads. Supports Dual Channel We test every module before it leaves the building, and back all of our purchases up with a LIFETIME WARRANTY!  PC3-12800 (1600MHz)  DDR3 Laptop memory upgrade Non-ECC Non-Parity Unbuffered Density: 32GB (4x 8GB SO-DIMM) Timing: 10-10-10-27 (1600 MHz) Speed: 1600MHz CL10 Pin Out: 204 Pin Voltage: 1.5V Lifetime Warranty Compatible with PC laptops that accept 8GB per memory slot