If unsure of the ram you require its best to compare the ram you have installed or send us a picture or part number we can match it or provide a alternative for both apple and windows systems.
Samsung 8GB (2x4GB) DDR3 PC3-10600S 204-Pin Laptop M471B5273CH0-CH9 Tested
8GB (2x4GB) DDR3 1600MHz PC3-12800S 204pin SODIMM SK Hynix RAM Laptop UK Seller
Hynix 8GB 2X4GB DDR3 2RX8 1333MHz PC3-10600S 204pin Laptop Memory RAM Apple 1328
Samsung 8GB 2X4GB DDR3 2RX8 1333MHz PC3-10600S 204pin Laptop Memory RAM Apple
Crucial 8GB 2X4GB DDR3 1RX8 1600MHz PC3L-12800S 204pin Laptop Memory RAM 1604
Crucial 8GB 2X4GB DDR3 1RX8 1600MHz PC3L-12800S 204pin Laptop Memory RAM 1645
