Type of memory module/card soDIMM , Memory module used in laptops Capacity of Memory 4GB Weight 9 g Dimensions 68 mm x 30 mm x 4 mm Shape Irregular Memory Format SODIMM Memory Architecture Unbuffered, Non-ECC Memory Clock Speed 1066 MHz Memory Interface DDR3 Total Kit Capacity 4 GB Number of Modules in Kit 1 x 4 GB CAS Latency 7 Memory Ranks Dual Rank