78Y7385 - IBM Lenovo 4GB DDR3-1333MHz PC3-10600 non-ECC Unbuffered CL9 204-Pin SoDimm Dual Rank Memory Module

Lenovo 1GB and 4GB DDR3 1333 SODIMM memories offer maximum data transfer rates up to 10600MB/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.