8GB ( 1x 8GB Module ) DDR4 2666 MHz ( PC4-21300 ) DDR4 DIMM ( 288-Pin ) ECC RDIMM ( Registered DIMM ) 1.2V - DDR4 Standard Voltage Compatible Equivalent for IBM-Lenovo 01KR186, 01KR363, 01AG617, 4X70P98201, 7X77A01301 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