The R730 is the homelab king of hand-me-down enterprise iron: a 13th-generation dual-socket platform that the off-lease market has made almost free, wrapped around twenty-four DDR4 slots that accept the cheapest registered ECC memory in the market — 2133 and 2400 MT/s grades that newer platforms left behind. Dell's owner's manual documents bus frequencies from 1333 through 2400 MT/s, RDIMMs to 768GB dual-socket and LRDIMMs to a 3TB theoretical ceiling.
Our live table applies the platform's verified rules to the tracked catalog — and this is one platform where the tracker's DDR4-2400 stock is squarely in the sweet spot. Faster DDR4 grades also work, downclocking to the platform's 2400 ceiling, which matters because 2666-rated pulls are sometimes cheaper than 2400-rated ones; the table's 'runs at' column keeps that honest.
Owner's manual lists memory bus frequencies of 1333, 1600, 1866, 2133 or 2400 MT/s.
RDIMM max 384GB single / 768GB dual processor; LRDIMM max 1536GB single / 3TB dual. DIMM options include 8-32GB 2R RDIMMs and 64/128GB quad-rank LRDIMMs.
Source: Dell official documentation
Operating speed depends on CPU generation and DIMMs per channel — Owner's manual lists memory bus frequencies of 1333, 1600, 1866, 2133 or 2400 MT/s.. Always verify against Dell's QVL for your exact configuration.
| Brand | Module | Capacity | Speed | Type | $/GB | Price | |
|---|---|---|---|---|---|---|---|
| A-Tech | B0BPN414ZJ | 64GB | DDR4-2666 (runs at up to 2400 here) | LRDIMM | $4.31 | $275.96 | Buy → |
| A-Tech | M393A2G40DB0-CPB | 16GB | DDR4-2133 | RDIMM | $4.53 | $72.48 | Buy → |
| Samsung | M393A4K40CB1-CRC | 32GB | DDR4-2400 | RDIMM | $4.84 | $154.94 | Buy → |
| SK Hynix | HMAA8GL7MMR4N | 64GB | DDR4-2400 | RDIMM | $4.92 | $314.95 | Buy → |
| A-Tech | B0BPN4FLDX | 32GB | DDR4-2666 (runs at up to 2400 here) | RDIMM | $5.02 | $160.53 | Buy → |
| Micron | MTA36ASF4G72PZ | 32GB | DDR4-2666 (runs at up to 2400 here) | RDIMM | $5.47 | $175.00 | Buy → |
| A-Tech | B083Q3F5DX | 32GB | DDR4-2400 | RDIMM | $5.69 | $182.12 | Buy → |
| Samsung | M393A2G40EB1-CPB | 16GB | DDR4-2133 | RDIMM | $5.76 | $92.18 | Buy → |
| Samsung | M393A8K40B22-CWD | 64GB | DDR4-2666 (runs at up to 2400 here) | RDIMM | $6.23 | $399.00 | Buy → |
| Supermicro | B07DFLTWN3 | 64GB | DDR4-2666 (runs at up to 2400 here) | LRDIMM | $6.23 | $399.00 | Buy → |
| SK Hynix | HMA84GR7CJR4N-VK | 32GB | DDR4-2666 (runs at up to 2400 here) | RDIMM | $6.72 | $214.94 | Buy → |
| Samsung | M393A4K40CB2-CTD | 32GB | DDR4-2666 (runs at up to 2400 here) | RDIMM | $6.81 | $218.01 | Buy → |
| A-Tech | B0C2FML23M | 64GB | DDR4-2933 (runs at up to 2400 here) | RDIMM | $8.06 | $515.96 | Buy → |
| A-Tech | KTD-PE429 | 64GB | DDR4-2933 (runs at up to 2400 here) | RDIMM | $8.28 | $530.11 | Buy → |
| Samsung | M393A2K43CB2-CTD8Q | 16GB | DDR4-2666 (runs at up to 2400 here) | RDIMM | $8.37 | $133.99 | Buy → |
| A-Tech | B0BPN4L74H | 32GB | DDR4-2933 (runs at up to 2400 here) | RDIMM | $9.11 | $291.60 | Buy → |
| Kingston | KSM24RD4/32MEI | 32GB | DDR4-2400 | RDIMM | $9.22 | $295.10 | Buy → |
| A-Tech | B0CGJFB4TG | 32GB | DDR4-2933 (runs at up to 2400 here) | RDIMM | $9.33 | $298.70 | Buy → |
| SK Hynix | HMAA8GR7AJR4N-XN | 64GB | DDR4-3200 (runs at up to 2400 here) | RDIMM | $9.36 | $599.00 | Buy → |
| Samsung | M393A8G40BB4-CWE | 64GB | DDR4-3200 (runs at up to 2400 here) | RDIMM | $9.98 | $639.00 | Buy → |
| A-Tech | MTA36ASF8G72PZ | 64GB | DDR4-3200 (runs at up to 2400 here) | RDIMM | $10.56 | $675.95 | Buy → |
| Samsung | M393A2K43BB1-CTD6Q | 16GB | DDR4-2666 (runs at up to 2400 here) | RDIMM | $10.97 | $175.49 | Buy → |
| Kingston | KTD-PE426 | 32GB | DDR4-2666 (runs at up to 2400 here) | RDIMM | $11.09 | $354.96 | Buy → |
| Crucial | B017UGKB32 | 16GB | DDR4-2400 | RDIMM | $11.25 | $179.99 | Buy → |
| Samsung | M393A2K43DB2-CTD6Y | 16GB | DDR4-2666 (runs at up to 2400 here) | RDIMM | $12.19 | $194.99 | Buy → |
| Samsung | M393A8G40AB2-CWE | 64GB | DDR4-3200 (runs at up to 2400 here) | RDIMM | $12.48 | $799.00 | 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 24 DIMM slots. Populate channels per the OEM rules below for full bandwidth.
Minimum of one memory module must be installed per processor (minimum 4GB single processor, 8GB dual).
Speed behavior on this platform: Owner's manual lists memory bus frequencies of 1333, 1600, 1866, 2133 or 2400 MT/s. 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.
R730 shopping is bargain-hunting by design, so exploit the platform's forgiving floor: anything from 2133 up qualifies, which means the cheapest per-GB DDR4 in the entire market is usually eligible — including 2400 and 2666 pulls whose newer-platform demand has evaporated. The table's 'runs at' column shows the downclock honestly; your wallet will not notice the difference your benchmarks cannot measure.
Populate with intent even on a budget: both sockets fed evenly, matched modules per channel, and one spare stick in the drawer per eight deployed — thirteenth-generation replacement stock will only get scarcer as the fleet sunsets. At current used prices, over-buying capacity now beats shopping again in two years against a thinner market.
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.
Nobody specs a new R730 in 2026; everybody upgrades one. The buyer is the homelab operator or bootstrapped small business that picked up a complete dual-Xeon unit for the price of a consumer motherboard and now wants the one thing the platform still does at modern standards: hold enormous amounts of cheap RAM. 256GB in an R730 — 8× 32GB at live DDR4 prices — costs less than 32GB of DDR5, and for the VM farms and storage arrays these machines run, capacity beats speed every time.
The used-purchase ritual applies in full force here: memtest86+ on arrival, ECC counters watched for the first weeks, and matched modules per channel to keep the elderly memory controller happy. Our DDR4 hub carries the full refurb guidance; the R730 is its ideal student.
Dell's documentation puts the platform maximum at 3TB across 24 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.
DDR4 RDIMM and LRDIMM at 1333 to 2400 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.
Dell's stated rules: Minimum of one memory module must be installed per processor (minimum 4GB single processor, 8GB dual). Mixed speeds, where allowed, run at the slowest module's speed — buying identical part numbers per channel remains the safe pattern.
Yes — modules rated above 2400 MT/s downclock to the platform's supported speed and run normally, which is why the table marks them "runs at up to 2400 here". Modules rated below 1333 MT/s are excluded from the table because Dell does not list them as supported.
8× 64GB fills 512GB and leaves 16 of the 24 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.
Used and refurbished DDR4 ECC is a rational choice for this platform — DRAM has no meaningful wear mechanism, and tested pulls from decommissioned fleets often undercut new pricing substantially. Run memtest86+ on arrival and watch ECC counters for the first weeks. For production fleets, new modules with warranty remain the conservative default.
Used 32GB DDR4-2400 RDIMMs (2Rx4) from decommissioned fleets are the platform's classic fuel — abundant, tested, and cheap per GB. Eight of them delivers 256GB across both sockets' channels; check the live table for today's cheapest qualifying part and note that 2666-rated pulls also qualify, downclocking harmlessly to 2400.