The Dell PowerEdge R750 is Dell's 15th-generation two-socket 2U rack server: two 3rd Generation Intel Xeon Scalable processors at up to 40 cores each, 32 DDR4 DIMM slots, up to 28 drives and up to eight PCIe Gen4 slots. It is the generation reaching the secondary market as fleets bought new in 2021 and 2022 refresh.

Two things you will meet while shopping are wrong. There is no Dell PowerEdge R750xd — Dell never published one, and the storage-dense role moved into the base chassis. And the end-of-support date attached to the R750 in search results is Dell's date for the PowerFlex Appliance R750, a converged-infrastructure node, not the general-purpose server.

Dell no longer sells the R750, R750xs or R750xa new through its US store, while the R660 and R760 are still listed for sale. The real choice is a refurbished R750 against a new 16th-generation machine, a trade new versus refurbished servers covers generally.

Who the Dell PowerEdge R750 is for — and who should buy an R750xs, R750xa or R760 instead

Buy the base R750 when the workload needs memory capacity, drive count or expansion slots; buy an R750xs when it needs none of the three; buy an R750xa only for double-wide accelerators. These are not trim levels of one machine: Dell gave them different DIMM counts, different thermal ceilings and, on the xs, slots too small for a full-height card.

Five readers should route elsewhere:

• You need 1U density. The 1U sibling shares the processor family: configure a Dell PowerEdge R650.
• You need double-wide accelerators. That is the Dell PowerEdge R750xa; the card is chosen in which Dell PowerEdge servers support GPUs.
• You need DDR5, PCIe Gen5 or EDSFF. That is the 16th generation: the R760 buying guide, after the two counter-intuitive facts below.
• You want mainstream VM density at the lowest cost. The Dell PowerEdge R750xs is built for that; its limits are tabulated below.
• You are shopping for an "R750xd". Dell does not publish one; you want a 24-bay 2.5-inch or 12-bay 3.5-inch refurbished Dell PowerEdge R750.

Unsure which generation? How to choose a Dell PowerEdge model and generation starts from the top.

Is the Dell PowerEdge R750 end of life?

No. Dell publishes no end-of-life or end-of-service-life date for the PowerEdge R750, and the only Dell-authored date attached to anything called "R750" belongs to a PowerFlex appliance node.

Asked "When is Dell PowerEdge R750 EOL" on Dell's support forum, a Dell moderator posting as DELL-Joey C answered on 12 September 2024: "There isn't any article or documentation on PowerEdge EOL/EOSL/EOSS dates." The databases agree by omission: Service Express lists PER750 as "Supported" with both fields reading "Date Not Published," and Park Place Technologies' PowerEdge list omits the R750, its newest row dated 06/01/2019.

One Dell document does put a date beside an "R750", and it describes a different product. Dell KB 000305299, titled "PowerFlex: Software and Hardware End of Support\End of Life Dates" and last updated 2 June 2026, gives the PowerFlex Appliance R750 and the PowerFlex custom Node R750 an end of life of 4 November 2024 and an end of standard support of 30 November 2029. PowerFlex is Dell's software-defined storage platform, and a PowerFlex Appliance R750 is an R750 chassis inside a pre-integrated system with its own software stack and support contract. That document scopes itself to PowerFlex "End of expansion (EOexp) and Software End of Standard Support (EoSS) codes", holds no R750xs or R750xa rows, and heads that column End of Standard Support, not end of service life.

That PowerFlex appliance date is restated in search results and AI-generated summaries as though it governed a standalone PowerEdge R750. It does not, and the scoping is checkable from the document's title.

The only date that applies to your machine is tied to its service tag, and it sits behind a filter that hides it.

1. Enter the service tag on Dell's support site.
2. Open the Service Event tab.
3. Untick "Only show active events."
4. Read the End of Service Life date.

Step three is the one everybody misses, which is why so many buyers conclude Dell publishes nothing. Ask the seller for the tag and run it.

For an age anchor, Dell announced the R750 on 17 March 2021, availability planned for that May, against the same moderator's rule of thumb that "Usually the server models EOL is based on 5 to 7 year after it's shipped date" — an estimate, not a specification. The wider evidence sits in the full end-of-life evidence for Dell PowerEdge servers.

Dell PowerEdge R750 specs at a glance

Every row is from Dell's PowerEdge R750 Technical Guide (Rev A03, November 2022) and the Installation and Service Manual. Where the widely-quoted figure is incomplete, the complete one is given.

Dell PowerEdge R750 specifications, from Dell's Technical Guide and Installation and Service Manual

Specification	Value
Processors	One or two 3rd Gen Intel Xeon Scalable, up to 40 cores and 270 W per socket
DIMM slots	32 — 8 channels per processor, 2 sockets per channel
Memory types	DDR4 RDIMM, LRDIMM, 3DS; Optane PMem 200 (16 max); no UDIMM
Memory speed	3200 MT/s at both 1 and 2 DIMMs per channel
Max memory, DDR4	2 TB RDIMM (32 × 64 GB) or 8 TB LRDIMM (32 × 256 GB)
Max memory with PMem 200	Dell states "around 12 TB per system"; 6 TB per socket
Front drive bays	Up to 24 × 2.5-inch or 12 × 3.5-inch
Max total drives	28 (24 front + up to 4 rear); up to 24 NVMe
PCIe slots	Max 8 Gen4, up to 6 of them x16 — not both at once
Networking	2 × 1 GbE LOM; OCP 3.0 on x8 lanes
Controllers, boot	HBA355i/e, PERC H345 to H840; BOSS-S1 or hot-plug BOSS-S2

The three memory ceilings are all correct and answer different questions. 2 TB is the largest RDIMM build; 8 TB is the DDR4 ceiling, needing 256 GB LRDIMMs in all 32 slots; the roughly 12 TB figure is a mixed build of eight 512 GB Optane modules plus eight 256 GB LRDIMMs per processor, so only half the slots hold DDR4. Dell's documents disagree on whether that mix is legal: the service manual says "Intel Persistent Memory 200 series (BPS) cannot be mixed with 256 GB LRDIMM." Buy against 2 TB and 8 TB.

How the R750 sits between the R740 and the R760

The R750 gained memory slots and a PCIe generation over the R740, and the two things it does better than the R760 are the ones nobody expects. It moved from 24 DIMM slots to 32 and 28 cores per socket to 40, while accelerator capacity fell from three double-wide 300 W cards to two (the R740 buying guide covers it). Against the R760, Dell's own comparison shows Gen5 costing half the slots — "Up to 8 x PCIe Gen4 or up to 4 x PCIe Gen5" — and the R750's DDR4 holding 3200 MT/s fully populated where the R760's DDR5 drops to 4400.

R750 vs R750xs vs R750xa: which one to buy

The R750xs is not a cheaper R750 — it is a narrower platform on five axes at once, and no amount of configuring gets it back. The R750xa makes the opposite trade, keeping the memory and processor ceiling and giving up the drive bays.

Dell PowerEdge R750, R750xs and R750xa compared on the buying axes, from Dell's three Technical Guides

Buying axis	R750	R750xs	R750xa
DIMM slots	32	16	32
Memory types	RDIMM, LRDIMM, 3DS	RDIMM only, largest 64 GB	RDIMM, LRDIMM, 3DS
Max memory (DDR4)	8 TB LRDIMM / 2 TB RDIMM	1024 GB	RDIMM / LRDIMM to 128 GB; ~10 TB with PMem (Dell)
Optane PMem 200	Yes, 16 modules	No	Yes
Max cores per socket	40	32	40
Max CPU TDP	270 W	220 W	270 W
Max total drives	28 (24 front)	26	8
PCIe slots	Max 8 Gen4, up to 6 x16	2, all low-profile, 75 W	Max 8 Gen4, up to 6 x16
Accelerator capacity	2 × double-wide 300 W	None	4 × double-wide 300 W

Choose the base R750 when any one row binds: more than 16 DIMM slots, more than 1024 GB of memory, LRDIMM or persistent memory, more than two expansion cards, more than 26 drives, or a processor above 32 cores or 220 W. Any one forces the full chassis. Configure a refurbished Dell PowerEdge R750.

Choose the R750xs when none of them binds — mainstream virtualisation, moderate VM density, a file or application host. Inside its ceilings it is a sensible buy, not a compromise. It cannot take an accelerator for a structural reason: Dell lists every slot in every xs riser configuration as low-profile, half-length and 75 W, and the guide's only mention of accelerators reads "non-GPU VDI." Configure a Dell PowerEdge R750xs.

Choose the R750xa only for accelerator density. It keeps the 32 DIMM slots and the 40-core, 270 W ceiling and spends the chassis volume on four double-wide 300 W cards: eight front bays against 28. Configure a Dell PowerEdge R750xa and pick the card with which Dell PowerEdge servers support GPUs. Dell explains the suffixes in PowerEdge "xs" vs. "Standard" vs. "xa" Servers, and our own guide to choosing a Dell PowerEdge model and generation covers the suffix question across the range.

Is there a Dell PowerEdge R750xd?

No. Dell has never published an R750xd, and the storage-dense role that the "xd" suffix marked on the previous generation was absorbed into the base R750 chassis instead.

The evidence is a controlled test, not an absence of search results. Dell's owner's-manual namespace returns a document for the R750, R750xs and R750xa and nothing for an R750xd — while serving an R740xd owner's manual at the identical URL shape. Absence inside a namespace proven to hold "xd" models is far stronger than absence from a search engine.

The name is a reasonable guess that Dell did not adopt. On the 14th generation "xd" marked a separately documented storage-dense model; on the 15th, Dell put that capability into the base chassis, whose storage list includes 24 × 2.5-inch plus 4 × 2.5-inch rear, and 12 × 3.5-inch with two or four rear bays. A storage-dense R750 is an R750 on the right backplane.

The label is in genuine circulation, turning up in Dell's own community forum and in homelab threads to mean a storage-heavy R750, so treat such a listing as imprecise, not dishonest. Ask which backplane the machine has, then configure the real thing on the R750 build page.

Which 3rd Gen Xeon Scalable CPUs are worth paying for in a used R750

On this platform the processor sets the memory speed, and that one column decides more about real performance than the Silver, Gold or Platinum badge does. Install 3200 MT/s memory behind a part capped at 2666 and it runs at 2666. The Silver 4300 line caps the system at 2666 MT/s and most Gold 5300 parts at 2933; only Gold 6300 and Platinum 8300 reach 3200, and even there the 6336Y and 6314U stop at 2666, the 8351N and 8352V at 2933.

Selected 3rd Gen Intel Xeon Scalable processors from Dell's supported-processor table for the R750

Processor	Cores	Base GHz	Cache MB	Max memory MT/s	TDP W
Platinum 8380	40	2.3	60	3200	270
Platinum 8358	32	2.6	48	3200	250
Platinum 8352Y	32	2.2	48	3200	205
Platinum 8352M	32	2.3	48	3200	185
Gold 6354	18	3.0	39	3200	205
Gold 6346	16	3.1	36	3200	205
Gold 6338	32	2.0	36	3200	205
Gold 6338N	32	2.2	48	3200	185
Gold 6334	8	3.6	18	3200	165
Gold 6330	28	2.0	42	2933	205
Gold 6330N	28	2.2	42	3200	165
Silver 4309Y	8	2.8	12	2666	105

The 6330 is the trap of the family. Beside the 6338 at the identical 205 W, the 6338 gives 32 cores against 28 and 3200 MT/s against 2933; no column favours the 6330. Anyone shopping for a 28-core Gold should take the 6330N — same 28 cores, full 3200 MT/s, 165 W.

The best cores per watt are the 185 W 32-core parts. The 6338N and 8352M each give 32 cores, 48 MB of cache and full 3200 MT/s at 185 W: 5.8 W per core against 7.8 W for the 250 W 8358, freeing 130 W across two sockets and relaxing the fan-grade and card-count constraints below. At 205 W the Platinum badge buys clock and nothing else — the 8352Y and 6338 are both 32 cores, 48 MB and 3200 MT/s, separated by about ten percent of base clock.

For per-core-licensed software, buy cache and clock rather than cores. The 6334 and 6346 give 2.25 MB of cache per core and the 6354 gives 2.17, against roughly 1.5 MB across most 32-core parts; the 6334 also carries the list's highest base clock, 3.6 GHz, at 165 W.

Three parts to rule out for an air-cooled two-socket refurb: the 8368Q needs liquid cooling and the 6312U and 6314U are single-socket only. Dell also marks the 4309Y, 4310 and 4316 as not Optane-capable. Browse Intel server processors.

R750 memory configuration rules

Dell publishes two lists of supported DIMM counts and they are routinely quoted against each other as though they conflicted. They do not: the system list is the per-processor list doubled. Both sit in one table in Dell's service manual.

Supported DIMM populations for the Dell PowerEdge R750, from Dell's memory population rules

DIMMs per processor	Total, single-processor R750	Total, dual-processor R750
1	1	2
2	2	4
4	4	8
6	6	12
8	8	16
12	12	24
16	16	32

Anything outside the right-hand column has no supported layout, and Dell warns that an "unbalanced or odd memory configuration results in a performance loss and system may not identify the memory modules being installed." Both processors must match; one processor uses sockets A1 to A16.

Four rules from Dell's installation guidelines decide whether a memory lot is worth buying.

• The slowest module governs everything. Modules of different speeds "operate at the speed of the slowest installed memory module(s)" — one 2666 MT/s stick drags a 3200 MT/s bank down.
• Populate white release tabs before black. White is the first slot of each channel; fill black first and channels sit empty while the bank looks full.
• Only RDIMMs may be mixed by capacity, and only two capacities system-wide. LRDIMM capacities may not be mixed, nor RDIMM with LRDIMM.
• Every module must be DDR4. A mixed pallet from a 16th-generation decommission is scrap here.

The part buyers do not expect is that filling this machine costs nothing in speed. Dell's supported-memory matrix gives 3200 MT/s at both one and two DIMMs per channel, for RDIMMs from 8 to 64 GB and LRDIMMs at 128 and 256 GB. A fully populated R750 keeps its rated speed, unlike the DDR5 generation that replaced it.

Persistent memory adds three rules: one PMem module per channel, so sixteen per system; a PMem module sharing a channel with DDR4 goes in the second, black slot; and PMem capacities cannot be mixed, a mismatch showing as an F1/F2 warning at POST.

What we build: our R750 and R750xa configurators run DDR4 ECC modules from 8 to 128 GB at 2666, 2933 and 3200 MT/s, 32 modules per system; the R750xs is held to sixteen modules of up to 64 GB. Browse DDR4 server memory, and see R750 power consumption and PSU sizing for what a populated bank costs in watts.

R750 drive bays, backplanes and the PCIe trade

The R750 holds 28 drives, not 24 — and the moment you ask for the rear bays that make it 28, the maximum PCIe slot count drops from eight to six. The trade sits in Dell's riser table.

Twenty-four is the maximum front 2.5-inch bay count; Dell's storage list adds four rear bays for the 28-drive ceiling, and the largest 3.5-inch build is 12 × 3.5-inch plus 4 × 2.5-inch. Two constraints hide there: the 16- and 24-bay NVMe RAID layouts are marked "Dual Controller Required", and direct-attach NVMe stops at 16 drives, the step to 24 made by paddle cards that eat riser positions.

Dell PowerEdge R750 riser configurations: slot count, x16 slots, and whether rear drive bays are possible

Config	Processors	PCIe slots	Of which x16	Rear drive bays
0	2	4	0	No
1	2	8	2	No
2	2	6	4	No
3	2	6	3	No
4	2	6	6	No
5	2	4	2	Yes
6	2	6	2	Yes
7	2	4	1	No
8	1	3	1	No
9	1	1	1	Yes

• You cannot have eight slots and rear drive bays. Rear storage exists in three configurations, the best giving six slots.
• You cannot have eight slots and six x16 slots. "Max 8 PCIe 4.0, up to 6 x16" is a menu, not a total.
• A single-processor R750 is not half an R750 on PCIe. One processor takes you from eight slots to three, or one with rear bays, while memory only halves.

Cooling is set by the backplane at least as much as by the processor, and the version circulating online is wrong in both directions. Dell's thermal restriction matrix requires high-performance silver fans from 105 W — its lowest supported TDP — on every 2.5-inch backplane except the 8-bay NVMe one. From 185 W to 270 W it wants gold, or silver with the supported ambient dropped to 30 °C. Above 165 W, riser configurations 1 to 4 cap several backplanes at four cards, and grades cannot be mixed. A 12-bay 3.5-inch or rear-bay R750 supports no accelerator at all: Dell's GPU kits need T-type heat sinks, a shroud and six high-performance fans.

The controller decides the storage architecture, so pick it before the drives. The HBA355i is pass-through, for vSAN, Ceph or ZFS; the H755 is general-purpose hardware RAID; the H755N is the NVMe RAID part. The front PERC buys back a slot by using a dedicated connector, and the hot-plug BOSS-S2 costs neither a bay nor a slot — a mirrored M.2 SATA pair for the hypervisor, all 28 bays left for data. The OCP 3.0 slot runs on eight PCIe lanes against the 16th generation's x16, so 100 GbE wants a PCIe slot. Browse PERC RAID controllers, host bus adapters, BOSS cards and NVMe SSDs, plus drive endurance, DWPD and TBW.

What we build: our base R750 configurator runs end to end on the 8-bay and 24-bay 2.5-inch chassis, the 24-bay carrying the backplane selector for the SAS/SATA, 16-plus-8-NVMe and universal layouts plus rear flex bays; the R750xs configurator covers the 3.5-inch layouts.

What to check before you buy a used R750

These are the verification steps we run on an R750 that has arrived, not advice on what to order.

1. Read the processor model string in iDRAC or BIOS, not off the heatsink. The 6330-versus-6338 distinction is invisible in a photograph and the memory ceiling rides on it.
2. Count populated DIMM slots per processor. The count must be 1, 2, 4, 6, 8, 12 or 16, both processors must match, at most two capacities may be present, every module must report one speed, and white tabs come first.
3. Identify the backplane, not the bay count. A 24-bay front panel can front a SAS/SATA, NVMe, switched-NVMe or 16-plus-8 backplane, which decides NVMe support and controller count.
4. Check whether a rear drive module is fitted, then count the physical PCIe slots and their widths. The rear module is the difference between 26 and 28 drives and pins the riser configuration, capping slots at six; eight slots and six x16 slots are mutually exclusive, and a single-processor machine has three, or one with rear bays.
5. Identify the storage controller by model and test the cache battery. H755 and H755N are different parts, HBA355i is not RAID, and a dead battery silently kills write-back.
6. Confirm both power supplies are present and matched. Dell compares the pair at POST, enables only the larger when they differ, and warns in BIOS, iDRAC or the LCD; a mismatched supply hot-added to a running system is never enabled. Sizing: R750 power consumption.
7. Check that all six fans are one grade, correct for the backplane and processor. Mixing grades is unsupported, and 105 W on a 16- or 24-bay backplane needs silver.
8. Check the iDRAC licence tier and firmware in the iDRAC interface. System Lockdown needs Enterprise or Datacenter; transferability is covered in the PowerEdge end-of-life evidence.
9. Confirm the mechanical parts are in the box — which rail kit is fitted, plus bezel, caddies and blanks. With a GPU fitted, confirm T-type heat sinks and the shroud.

Frequently Asked Questions

Is the Dell PowerEdge R750 end of life?

No, and there is no model-level date to find. A Dell moderator answering that question said "There isn't any article or documentation on PowerEdge EOL/EOSL/EOSS dates." Service Express lists part number PER750 as "Supported" with both dates "Date Not Published", and Park Place's list omits it. For the date that applies to your machine, run its service tag through Dell's Service Event tab with "Only show active events" unticked.

Does Dell's PowerFlex end-of-support date of 30 November 2029 apply to a standard PowerEdge R750?

No. Dell KB 000305299, "PowerFlex: Software and Hardware End of Support\End of Life Dates", gives the PowerFlex Appliance R750 and PowerFlex custom Node R750 an end of life of 4 November 2024 and an end of standard support of 30 November 2029. PowerFlex is Dell's software-defined storage platform, and those rows are pre-integrated nodes with their own support contract, which a standalone PowerEdge R750 is not.

Is there a Dell PowerEdge R750xd?

No. Dell publishes a technical guide and an owner's manual for the R750, R750xs and R750xa, and none for an R750xd, while publishing both for the R740xd at identical URL shapes. The name comes from the previous generation, where "xd" marked a storage-dense model; on the R750 that role moved into the base chassis, which reaches 28 drives. Ask which backplane a listing means.

How much RAM can a PowerEdge R750 hold?

It depends which memory you mean. Across 32 DIMM slots the R750 reaches 2 TB with 64 GB RDIMMs and 8 TB with 256 GB LRDIMMs; with Intel Optane Persistent Memory 200 Series alongside DDR4, Dell states a system maximum of "around 12 TB", or 6 TB per socket. Buy against 2 TB and 8 TB.

What is the difference between the R750 and R750xs?

The R750xs is narrower on five axes at once: 16 DIMM slots against 32, a 1024 GB memory ceiling against 8 TB, registered DDR4 only with no LRDIMM or persistent memory, 32 cores and 220 W per socket against 40 and 270 W, and two low-profile 75 W PCIe slots against up to eight Gen4. Nothing configures across those limits.

What CPUs does the Dell R750 support?

3rd Generation Intel Xeon Scalable, one or two per system, from the 8-core 105 W Silver 4309Y to the 40-core 270 W Platinum 8380. The detail that matters when buying used is that the processor sets the memory speed ceiling: every Silver 4300 part caps the system at 2666 MT/s and most Gold 5300 parts at 2933, whatever DIMMs are installed.

How many drive bays does the R750 have?

Up to 28, and the figure usually quoted, 24, is the front bays only. Dell documents 24 front 2.5-inch bays plus four rear, two-bay rear options, and a 12-bay 3.5-inch layout carrying four rear drives for 16. The catch is in the risers: rear bays exist in three riser configurations only, and the best gives six PCIe slots, not eight.

Can you put a GPU in an R750xs?

No. Dell specifies every expansion slot in every R750xs riser configuration as low-profile, half-length and 75 W, so there is no double-wide position and no power budget for one; the guide's only reference to accelerators calls its target workload "non-GPU VDI." The base R750 takes two double-wide 300 W cards, the R750xa four, a 12-bay 3.5-inch or rear-bay R750 none.

How many DIMMs can I actually install in an R750?

Per processor the supported counts are 1, 2, 4, 6, 8, 12 or 16. Per dual-processor system they are 2, 4, 8, 12, 16, 24 or 32, the same list doubled, because Dell requires both processors to be populated identically. A single-processor R750 uses sockets A1 to A16. Counts outside those lists have no supported layout, and a system is limited to two DIMM capacities, mixable only among RDIMMs.

When was the Dell PowerEdge R750 released?

Dell announced the R750 with the rest of its 3rd Gen Intel Xeon Scalable PowerEdge line on 17 March 2021, with global availability planned for May 2021; its Technical Guide marks most supported processors "May '21" release-to-sell. That matters because Dell publishes no model-level end-of-life date, and the only rule of thumb on record is five to seven years from ship.

Where to go from here

Run the Service Event lookup on the machine's service tag first. It is the only lifecycle answer that applies to the server you would own. Then pick the chassis before the components, because the backplane and riser choice constrains everything else. Configure a refurbished Dell PowerEdge R750 for memory, drives or slots; a Dell PowerEdge R750xs for mainstream virtualisation inside its ceilings; or a Dell PowerEdge R750xa for accelerator density. All three sit in our wider Dell PowerEdge range.