57Y6511 - IBM 2GB DDR3-1066MHz PC3-8500 non-ECC Unbuffered CL7 204-Pin SoDimm Single Rank Memory Module

Lenovo 2G DDR3 1066 SODIMM MemoryB-WW offers maximum data transfer rates up to 8500MB/sec to help you increased performance of memory intensive applications such as streaming video, graphics and CAD programs. Adding more system memory is one of the least expensive ways to help boost overall notebook system performance and allows more multitasking which saves time and hassle. Data transfer rates vary and are often less than the maximum possible.