PowerEdge is the most widely traded server family on the secondary market — which makes its generations and naming the first thing a used-hardware buyer should learn.
Knowledge pages are educational references, independent of sales inventory. Items without confirmed sourcing are reference-spec — quoted on demand.
Read a PowerEdge model like R750 in three characters: R = rack (T = tower, M/MX = modular); the first digit is the class (6 = mainstream 1U, 7 = mainstream 2U, 9 = high-end); the second digit marks the generation — 4x = 14th Gen, 5x = 15th Gen, 6x = 16th Gen. So an R640 is a 1U 14th-Gen machine and an R760 is a 2U 16th-Gen machine.
| Generation | Key models | CPU platform | Memory | Years |
|---|---|---|---|---|
| 13th Gen | R630 / R730 / R730xd | Xeon E5-2600 v3/v4 | DDR4-2133/2400 RDIMM · 24 slots | 2014–2017 |
| 14th Gen | R640 / R740 / R740xd | Xeon Scalable 1st/2nd Gen | DDR4-2666/2933 · 24 slots | 2017–2021 |
| 15th Gen | R650 / R750 | Xeon Scalable 3rd Gen (Ice Lake) | DDR4-3200 · 32 slots | 2021–2023 |
| 16th Gen | R660 / R760 | Xeon Scalable 4th/5th Gen | DDR5-4800/5600 | 2023– |
Most Dell PowerEdge DDR4 platforms take exactly the modules we stock — see 32GB DDR4 ECC RDIMM availability or use the DDR4 compatibility table.