1 X4GB means there are 1 pieces ram ,each ram is 4GB, total 4GB 2 X4GB means there are 2 pieces ram ,each ram is 4GB, total 8GB 1 X8GB means there are 1 pieces ram ,each ram is 8GB, total 8GB 2 X8GB means there are 2 pieces ram ,each ram is 8GB, total 16GB

CAS Latency:

1066MHz=CL7

warrantyPlease confirm your voltage before purchasing:DDR3L 1.35V low voltage (compatible with 1.5V)DDR3 1.5V standard voltage (incompatible with 1.35V)
Product Name: DDr3L Laptop MemoryMemory capacity: 4GB/8GBMemory Technology: SODIMM RAMFrequency:

PC3L-12800S(1600MHz)

PC3L-10600S(1333MHz)

PC3L-8500S(1066MHz)Voltage: DDR3L voltage is 1.35VInterface Type:DDR3L 204pinsCondition: NewCompatibility: Support all the motherboard
1.1 years warrant2.New brand with box3. Factory full tested with stable quality4. In stock for fast delivery make sure5.Free shipping(with the track number)
Please Note: In order to avoid disputes between the two parties, please refer to the details page for instructions before purchasing.Check the specifications of the device before purchasing. For example, computer motherboard model/RAM model/RAM slot/RAM frequency/maximum compatible memory capacity.Because of the arrival batches of different products, the production date and specific models and serial number is differnet. The picture shown on the mainsite is for referents. if there is fluctuation, according to the real object please!If you do not know the required parameters, please download the CPU-Z app software, all parameters can be seen, such as the following picture: