Dell PowerEdge R640Specifications, configurations & comparisons

Refurbished. The R640 is a 2017, 14th-generation PowerEdge, and the units we supply are re-certified: tested, wiped and covered by our own warranty rather than bought new. It is built in our refurbished PowerEdge configurator, alongside the R630, R730, R730xd, R740 and R740xd. Dell’s technical guide for the model makes no end-of-life statement either way, which is a documentation gap rather than a claim that it is still sold new.

There are 24 DDR4 slots, twelve beside each processor. The ceiling depends on what you fill them with: 1.53 TB of RDIMMs, 3 TB of LRDIMMs, 192 GB of NVDIMMs, or 6.14 TB of Intel Optane persistent memory — rising to 7.68 TB if persistent memory and LRDIMMs are combined. Persistent memory never occupies more than twelve of the slots.

Up to 2933 MT/s with one module per channel and 2666 MT/s with two, which is the trade-off you make when you fill all 24 slots. First-generation Xeon Scalable parts stop at 2666 MT/s. On top of that each processor carries its own rating, from 2133 MT/s on the Bronze 3104 to 2933 MT/s on the fastest Gold and Platinum parts, and the lower of the two always wins.

Twelve at most: ten 2.5-inch bays at the front plus the two-bay rear module. The alternatives are an eight-bay 2.5-inch front or four 3.5-inch bays. Dell publishes raw ceilings of 76.8 TB for the mixed ten-bay front, 64 TB for the all-NVMe version, 64 TB across the four large bays and 15.36 TB over the rear pair. Boot devices sit outside that count.

Yes. One backplane option wires all ten front bays straight to the processors with no RAID controller between them, and on the mixed SAS/SATA backplane up to eight of the ten can be NVMe. There is no hardware RAID across direct-attach drives, and Dell excludes its PERC 11 controllers — H750, H350 and HBA350i — from the ten-bay NVMe chassis, so plan redundancy in software.

Yes, and it is one of the few 14G guides that documents a purpose-built single-socket line: Table 8 names the 6212U, 6210U and 6209U. Only the 6209U is repeated in the main supported-processor table, so we source the other two to order. A one-processor machine has twelve DIMM slots rather than 24, and loses the left-hand riser, which is wired to the second socket.

Up to three PCIe Gen3 x16 slots across two riser connectors, plus two dedicated x8 Gen3 slots — one for the storage controller and one for the network daughter card — that do not consume any of the three. Only riser 2B takes a full-height, three-quarter-length card; everything else is low profile. The R630 before it ran its middle slot at x8.

Up to three single-width cards, or a single FPGA. Dell names the NVIDIA T4 as the GPU and gives no memory size or power figure for it in this guide, and lists no double-width option at all — a 1U chassis with this cooling design was never meant for large accelerators. Our refurbished configurator does not carry GPUs for this model, so ask us if a build needs one.

Two hot-plug units running 1+1, auto-ranging on input. Eleven entries appear across the power tables, from 495 W up to 1600 W, with Titanium versions of the 750 W and 1600 W supplies. Several are regional: mixed-mode DC and 240 V HVDC units for China, a 380 V HVDC unit for China and Japan, and a 1100 W −48 V unit for telco racks.

Its technical guide carries no withdrawal or end-of-service date, so the document cannot answer the question. In practice, support on a 14th-generation machine runs per service tag and most units are past their original cover, which is why third-party maintenance is the usual route. Our end-of-life checker tracks published dates as they are confirmed.