8GB ( 1x 8GB Module ) DDR3 1333 MHz ( PC3-10600 ) DDR3 DIMM ( 240-Pin ) ECC RDIMM ( Registered DIMM ) 1.5V - DDR3 Standard Voltage Compatible Equivalent for IBM-Lenovo 46U3419, 49Y1555, 57Y4427, 67Y1464, 49Y1431, 49Y1446, 49Y1436, 46C7453, 47J0157, 46C0542, 46C7451, 67Y0017 High performance Memory RAM upgrade designed for Server/Workstation Systems All modules undergo quality assurance testing to ensure dependable and reliable performance Please verify the supported memory (RAM) specifications of your system prior to purchase to ensure compatibility A-Tech provides a Lifetime Warranty for all orders & offers complimentary United States based Tech Support before, during, & after your purchase