Kingston memory is designed,manufactured and rigorously tested to meet the exact specifications of each system. It’s guaranteed to be compatible and backed by legendary Kingston reliability. DDR4 module 32 GB DIMM 288-pin 2666 MHz / PC4-21300 CL19 1.2 V registered ECC for Dell PowerEdge C4140; Dell EMC PowerEdge MX740, MX840, R430, R740, R840, R940