G.SKILL Ripjaws 32GB (4 x 8G) 204-Pin DDR3 SO-DIMM DDR3L 1866 (PC3L 15000) Laptop Memory Model F3-1866C10Q-32GRSL Cas Latency: 10 Timing: 10-10-10-32 Voltage: 1.35V Buffered/Registered: Unbuffered Features: 1.35V low voltage Compatible with systems that only support DDR3 1.5V Designed for 3rd and 4th gen Intel Core Processors Best-in-class quality