Lenovo 57Y6509, 1 GB, 1 x 1 GB, DDR3, 1066 MHz, 204-pin SO-DIMM Lenovo 57Y6509. Component for: Laptop, Internal memory: 1 GB, Memory layout (modules x size): 1 x 1 GB, Internal memory type: DDR3, Memory clock speed: 1066 MHz, Memory form factor: 204-pin SO-DIMM, CAS latency: 5