Mushkin Enhanced 8GB (2 x 4GB) 204-Pin DDR3 SO-DIMM DDR3 1333 (PC3 10666) Dual Channel Kit Laptop Memory Model 996647 Cas Latency: 9 Timing: 9-9-9-24 Voltage: 1.5V Buffered/Registered: Unbuffered Multi-channel Kit: Dual Channel Kit Features: Compatible Timings This product is programmed to use timings that offer maximum compatibility with your system and original memory. Dual Channel Kit Engineered for dual-channel architecture. Compatible Frequency This product is engineered to operate at the optimum frequency for compatibility with your system.