Dell 16GB 2666MHz DDR4 PC4-21300 CL19 ECC Registered RAM RDIMM Genuine Dell Memory Module (1x16GB)For Dell PowerEdge:T430 T440 T630 T640 R430 R440 R530 R530XD R540 R630 R630XL R640 R6415 R730 R730XD R730XL R740 R740XD R740XD2 R7415 R7425 R830 R840 R930 R940 R940XA C4130 C4140 C6420 M630 M640 M830 MX740C MX840C FC430 FC630 FC640 FC830 ServersPart Number(s) Dell Part# SNPVM51CC/16GThis Dell Part# SNPVM51CC\/16G is compatible with these Dell Servers and Storage Arrays: Dell PowerEdge Rack Servers:\r\n R430 R440 R530 R530XD R540 R630 R630XL R640 R6415 R730 R730XD R730XL R740 R740XD R740XD2 R7415 R7425 R830 R840 R930 R940 R940XA C4130 C4140 C6420 FC430 FC630 FC640 FC830 \r\n\r\n Dell PowerEdge Tower Servers:\r\n T430 T440 T630 T640 \r\n\r\n Dell PowerEdge Modules:\r\n M630 M640 M830 MX740C MX840C