Supermicro Memory by OEM Part Number

Every module on this page is matched to a specific Supermicro MEM-DR part number. If you have a MEM-DR number off a module label, a quote, or a Supermicro QVL, this is where you find the compatible equivalent — same density, same rank, same speed, same form factor, at a fraction of the OEM price.

The cross-reference covers All Supermicro Part Numbers across DDR3, DDR4 and DDR5, spanning registered RDIMM and LRDIMM for SuperServer platforms, ECC and non-ECC UDIMM for workstation and edge boards, and SODIMM.

Supermicro's own part numbering encodes the module type — EU48 is an ECC UDIMM, UN48 is non-ECC — and getting it wrong means a board that won't post. Search this page by part number to land on an exact match, or send us your list and we'll quote the set. Lifetime warranty on every module; purchase orders and net terms for business, government and education buyers.

How to read a Supermicro MEM-DR part number

Every Supermicro memory part number follows one pattern. Once you can read it, you can find the equivalent on this page without a lookup table.

MEM-DR   5    64    L   -SL01   -ER48
  |      |    |     |     |       |
  |      |    |     |     |       └─ module type + speed  (ER48 = ECC Registered, 4800 MT/s)
  |      |    |     |     └───────── DRAM vendor + revision  (SL01 = Samsung, rev 01)
  |      |    |     └─────────────── profile  (L = standard height)
  |      |    └───────────────────── capacity in GB  (08, 16, 32, 64, 12 = 128, 25 = 256)
  |      └────────────────────────── generation  (3 = DDR3, 4 = DDR4, 5 = DDR5)
  └───────────────────────────────── Supermicro DRAM module

DDR3 parts (MEM-DR3xx) use the same scheme with 13 = 1333, 16 = 1600, and 18 = 1866. A V after the speed (ER32V) marks a VLP low-profile module for blade and 1U-dense chassis; match that too.

Vendor codes are not a compatibility requirement

The middle block (SL01, HL02, ML01, CL02) records which DRAM maker Supermicro sourced that revision from: S Samsung, H SK hynix, M Micron, C Crucial. Supermicro publishes several vendor revisions of the same module because it qualifies more than one supplier; the board treats them as identical. What the board checks is generation, capacity, type, speed, and rank. That is what a NEMIX RAM equivalent matches, and it is why one NEMIX RAM part can replace MEM-DR416L-SL01-ER26, MEM-DR416L-HL01-ER26, and MEM-DR416L-CL01-ER26 alike.

Where you will see these numbers

• On the module label — Supermicro-branded memory carries the MEM-DR number on the sticker alongside the DRAM maker's own part number.
• In a Supermicro or reseller quote — system configurators price memory by MEM-DR number. Paste the line items into a quote request and we return a matched set.
• On the board's Tested Memory List — Supermicro's product pages list qualified MEM-DR parts per board. Any part on that list has an equivalent here.
• In the BMC — IPMI → System → Component Info shows the installed DIMMs with capacity, speed, and part number, so you can match what is already in the chassis before adding to it.

What "compatible equivalent" means here

A NEMIX RAM module listed against a MEM-DR number matches it on every attribute the memory controller checks: DDR generation, module capacity, ECC status, buffering (registered, load-reduced, or unbuffered), rated speed, rank organization (1Rx8, 2Rx4, and so on), voltage, and pin count. Researched, matched, and compatibility-tested by NEMIX RAM, a US-based server memory specialist since 1993, and backed by a lifetime warranty. Mixing NEMIX RAM modules with Supermicro-branded modules of the same MEM-DR spec in one board is supported, because to the controller they are the same part. Every module carries a lifetime replacement warranty with free US-based technical support.

Rules that prevent a no-POST

• Never mix types. ER, LR, and EU are mutually exclusive in a board. If the board is populated with ER, add ER.
• Match speed and rank to what is installed. Mixed speeds run at the slowest module; mixed ranks can force a lower speed or reduce the DIMMs-per-channel the board will accept.
• Check the CPU, not just the board. A board rated for ER56 runs a 4th Gen Xeon at 4800. The CPU sets the ceiling.
• Follow the population order. Fill one DIMM per channel (blue slots first on most Supermicro boards) before doubling up; that is what keeps the full memory bandwidth of the socket in play.

Ordering for fleets

NEMIX RAM is a registered federal supplier (UEI GV8MMYNDJ5J1, CAGE 59AB2) and accepts purchase orders with net terms for business, government, and education buyers. For multi-node orders, send the MEM-DR list and node count and we quote the full set, matched and shipped together. Volume and reseller pricing is available on request.

Frequently asked

My part number is not on this page. Decode it with the guide above and filter by capacity, speed, and form factor; the equivalent is usually listed under a different vendor revision of the same spec. If it is still missing, send us the number and we will match it.

Supermicro's Tested Memory List only names their own parts. Will this work? The list names the DRAM vendors and module specs Supermicro has qualified. NEMIX RAM builds on the same qualified DRAM to the same spec, and the lifetime warranty covers the module in your board.

Can I go faster than the MEM-DR spec calls for? A faster module runs at the board and CPU's supported speed at best; it is not a free upgrade, and on some platforms it will not train. Match the speed code.

What about ER32 vs ER32V? Same electrical spec; V is a low-profile module for chassis with limited clearance. If the original was VLP, stay with VLP.

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