Kingston Technology 4 GB 1333MHZ DDR3 PC3-10600 240-Pin SDRAM Memory for Select Lenovo Desktops KTL-TCM58B/4G Includes one 4GB module of 1333Mhz DDR3 Desktop Memory for Lenovo Replaces Lenovo 0A36527, 89Y9224 Specifically designed and tested for compatibility From the industry leader in PC memory