WEBPowerEdge R740xd. Features. Processor. Up to two Intel® Xeon® Scalable processors, up to 28 cores per processor. Memory. 24 DDR4 DIMM slots, Supports RDIMM /LRDIMM, speeds up to 2666MT/s, 3TB max Up to 12 NVDIMM, 192 GB Max Supports registered ECC DDR4 DIMMs only. Storage controllers.