4GB ( 1x 4GB Module ) DDR4 2133 MHz ( PC4-17000 ) DDR4 DIMM ( 288-Pin ) Non-ECC UDIMM ( Unbuffered DIMM ) 1.2V - DDR4 Standard Voltage Compatible Equivalent for Crucial CT4G4DFS8213 High performance Memory RAM upgrade designed for Desktop Computer 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