G.SKILL 8GB (2 x 4GB) 204-Pin DDR3 SO-DIMM DDR3 1600 (PC3 12800) Laptop Memory Model F3-12800CL11D-8GBSQ retail Capacity 8GB (2 x 4GB), Speed DDR3 1600 (PC3 12800) Cas Latency 11. Timing 11-11-11-28 Voltage 1.5V. ECC No Buffered/Registered: Unbuffered. Multi-channel Kit: Dual Channel Kit 204-Pin DDR3 SO-DIMM