8GB ( 1x 8GB Module ) DDR4 2666 MHz ( PC4-21300 ) DDR4 DIMM ( 288-Pin ) ECC UDIMM ( ECC Unbuffered DIMM ) 1.2V - DDR4 Standard Voltage Compatible Equivalent for Hynix HMA81GU7AFR8N-VK, HMA81GU7CJR8N-VK, HMA81GU7DJR8N-VK 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