LENOVO 64Y9570 COMP 4GB DDR3-1333MHZ ECC 1.5V DR UDIMMAddOn 4 GB DDR3 SDRAM Memory Module For Server 4 GB (1 x 4GB) DDR3 1333 PC3 10600 DDR3 SDRAM 1333 MHz Dual rank Memory CL9 1. 50 V ECC Unbuffered 240 pin UDIMM Lifetime Warranty VPN: 64Y9570 AM SKU: RSC615060 UPC: 821455637371 UDIMM 4 GB memory allows you to have more programs open at a time 1333 MHz speed to execute routine softwares at a steady pace 240 pin pin DDR3 1333 PC3 10600 operates at an effective bus speed with minimal power consumption and