G.Skill Ripjaws Series 8GB 204-Pin DDR3 SO-DIMM DDR3 1600 (PC3 12800) Laptop Memory (F3-1600C9S-8GRSL) 8GB single channel, DDR3 1600 (PC3 12800) Cas Latency 9; 1.35V 204-Pin DDR3 SO-DIMM; ECC: NO. Timing: 9-9-9-28; Buffered/Registered. Compatible with 3rd and 4th gen Intel Core Processors; Best-in-class quality.