The R760xs is the R760's cost-optimized sibling: same 2U family, same Xeon Scalable generations, but a leaner memory subsystem — sixteen DDR5 RDIMM slots instead of thirty-two, topping out at 1.5TB. That halving is exactly why buyers choose it: workloads that will never need 2TB of RAM shouldn't pay for the board that supports it. The memory shopping, though, is the same shortage-era DDR5 problem, and this page applies the same treatment.
Dell's documentation lists a wide operating range for the platform — 4000 through 5600 MT/s depending on processor generation and configuration — and notes that rated DIMM speed may reduce with the installed CPU. The table below holds our catalog to the platform floor; the QVL check against your exact CPU remains the buyer's final step.
4000/4400/4800 MT/s with 4th Gen Xeon SP; up to 5600 MT/s with 5th Gen; the rated DIMM speed may reduce depending on the processor installed.
Up to two 4th Gen Intel Xeon Scalable per spec sheet; ISM adds 5th Gen (max 1TB with 4th Gen, 1.5TB with 5th Gen).
Source: Dell official documentation
Operating speed depends on CPU generation and DIMMs per channel — 4000/4400/4800 MT/s with 4th Gen Xeon SP; up to 5600 MT/s with 5th Gen; the rated DIMM speed may reduce depending on the processor installed.. Always verify against Dell's QVL for your exact configuration.
| Brand | Module | Capacity | Speed | Type | $/GB | Price | |
|---|---|---|---|---|---|---|---|
| Samsung | M321R2GA3BB6-CQK | 16GB | DDR5-4800 | RDIMM | $28.13 | $450.00 | Buy → |
| Samsung | M321R4GA3BB6-CQK | 32GB | DDR5-4800 | RDIMM | $29.00 | $928.00 | Buy → |
| A-Tech | M321R4GA0PB0-CWM | 32GB | DDR5-5600 | RDIMM | $29.18 | $933.68 | Buy → |
| Samsung | M321R8GA0BB0-CQK | 64GB | DDR5-4800 | RDIMM | $30.55 | $1955.00 | Buy → |
| NEMIX | MTC20F2085S1RC48BR | 32GB | DDR5-4800 | RDIMM | $30.90 | $988.88 | Buy → |
| SK Hynix | HMCG88AEBRA168N | 32GB | DDR5-4800 | RDIMM | $31.13 | $996.26 | Buy → |
| A-Tech | B0DMC1VFNS | 96GB | DDR5-4800 | RDIMM | $31.15 | $2989.99 | Buy → |
| Samsung | M321RYGA0BB0-CQK | 96GB | DDR5-4800 | RDIMM | $31.15 | $2989.99 | Buy → |
| SK Hynix | HMCT04MEERA132N | 128GB | DDR5-4800 | RDIMM | $31.25 | $3999.99 | Buy → |
| Kingston | KSM56R46BD4PMI | 64GB | DDR5-5600 | RDIMM | $32.25 | $2064.00 | Buy → |
| Kingston | KSM56E46BD8KM | 48GB | DDR5-5600 | RDIMM | $33.33 | $1599.99 | Buy → |
| NEMIX | MTC10F1084S1RC56BR | 16GB | DDR5-5600 | RDIMM | $33.93 | $542.88 | Buy → |
| A-Tech | B0DYR9JXRH | 64GB | DDR5-6400 (runs at up to 5600 here) | RDIMM | $34.29 | $2194.49 | Buy → |
| Micron | MTC40F2046S1RC56BD2 | 64GB | DDR5-5600 | RDIMM | $37.50 | $2399.99 | Buy → |
| NEMIX | MTC40F204WS1RC56BB2R | 96GB | DDR5-5600 | RDIMM | $37.50 | $3599.99 | Buy → |
| NEMIX | MTC40F204WS1RC64BC1R | 96GB | DDR5-6400 (runs at up to 5600 here) | RDIMM | $38.54 | $3699.99 | Buy → |
| NEMIX | MTC40F204WS1RC64BR | 96GB | DDR5-6400 (runs at up to 5600 here) | RDIMM | $38.54 | $3699.99 | Buy → |
| Kingston | KSM56R46BD8PMI | 32GB | DDR5-5600 | RDIMM | $44.50 | $1424.00 | Buy → |
Each scenario is priced from the cheapest compatible in-stock module at that capacity, at the timestamp above. Configurations never exceed the platform's 16 DIMM slots.
Speed behavior on this platform: 4000/4400/4800 MT/s with 4th Gen Xeon SP; up to 5600 MT/s with 5th Gen; the rated DIMM speed may reduce depending on the processor installed. Faster-rated modules from the table above are safe — they operate at the platform's supported speed for your configuration rather than their label speed.
Paraphrased from Dell's official documentation. Anything the manual does not state is omitted here rather than guessed.
The sixteen-slot layout makes the R760xs's math cleaner than its bigger sibling's: one socket's channels fill at eight modules, both at sixteen, and there is no 96GB-tier population trap to step around. Practical builds start at 8× 32GB (256GB) and grow by doubling — either adding eight more or replacing with the 64GB tier, and the live table prices both moves side by side.
Watch the speed column when buying for 4th-gen silicon: the platform's listed range reaches 5600 MT/s but only 5th-gen processors use the top grades, so paying the 5600 premium for a 4th-gen box buys downclocked headroom, not performance. The 'runs at up to' notes in the table exist precisely to keep that purchase honest.
A final note on growth sequencing for this platform: because the R760xs caps at sixteen slots, the jump from half to full population is its only in-chassis expansion — after that, capacity growth means denser DIMMs, and denser DIMMs mean replacing, not adding. Buyers who expect memory demand to keep climbing should weigh starting at the 64GB tier even when 32GB covers today: the resale path for displaced smaller modules is thin in DDR5's young market, and buying the density once beats buying the capacity twice.
Every specification in the rules box above was verified against the Dell document linked beneath it before this page went live — nothing is inferred from forum lore or reseller listings, and any field the document does not state is simply absent here rather than guessed. The compatibility table applies those verified rules mechanically to our tracked module catalog: generation must match, the module type must appear in the platform's allowed list, speed must meet the documented floor, and per-DIMM capacity must respect the stated maximum. What survives that filter is sorted by live $/GB — computed against true 1024-based capacities — and refreshed on the same rolling cycle as every price on this site.
Two honest limits worth stating. First, our catalog tracks the retail module market, not Dell's option-part universe — a module absent from the table is not declared incompatible, merely untracked; the rules box tells you what any candidate must satisfy. Second, a compatibility table is not a QVL: Dell validates specific part numbers against specific configurations, and the disclaimer above the table is not boilerplate but the actual final step. Use this page to find the market's honest price for compliant memory; use the vendor's QVL to bless the exact part before a production order.
The R760xs draws the pragmatists: branch-office virtualization, mid-size database hosts, and storage-forward builds where the money went to drive bays rather than DIMM slots. With sixteen slots, population math is friendlier than the flagship's — eight modules fills a socket's channels once — and the scenarios above reflect that cleaner arithmetic at live prices.
Because the platform ships lean, its most common upgrade is the simplest one: doubling a half-populated configuration. Match the installed part number where possible; where the original part has drifted out of the market, the table's cheapest compliant module at the same capacity and speed is the substitute Dell's rules permit.
Dell's documentation puts the platform maximum at 1.5TB across 16 DIMM slots, with single modules supported up to 128GB. Reaching the maximum requires the largest supported DIMM in every slot — most real upgrades target far less, which is what the live scenarios above price.
DDR5 RDIMM at 4000 to 5600 MT/s, per Dell's documentation. Consumer non-ECC and XMP/EXPO kits are not supported — every module in the table above is a verified ECC server part of the correct type.
The Dell documentation we verified does not spell out mixing rules for this platform, so treat identical modules per channel as the rule: mixed configurations at best run at the slowest common speed, and at worst fail population requirements. Check the platform manual for your exact loadout before mixing.
Yes — modules rated above 5600 MT/s downclock to the platform's supported speed and run normally, which is why the table marks them "runs at up to 5600 here". Modules rated below 4000 MT/s are excluded from the table because Dell does not list them as supported.
8× 64GB fills 512GB and leaves 8 of the 16 slots free for later growth. Fewer, larger DIMMs preserve expansion room; more, smaller DIMMs are sometimes cheaper per GB — the live table above lets you price both routes at today's numbers.
For DDR5 platforms like this one there is effectively no refurbished market yet — the fleets that would feed it are still in service. Buy new, verify the part against Dell's QVL, and use each module's 90-day price chart (linked in the table) to time the purchase.
1.5TB with 5th-gen Xeon processors (1TB with 4th-gen), across sixteen RDIMM slots — half the flagship R760's. For workloads that fit, the smaller board is the better buy; for memory-bound growth, the step up to the R760's 32 slots is the safer platform choice.