SUPERMICRO | X-Series | H-Series | MOTHERBOARD | SuperServer | SuperWorkstation | OEM COMPATIBLE | SERVER | MEMORY

Memory upgrades for Supermicro motherboards, SuperServer systems and SuperWorkstations — matched to the exact board or chassis, not guessed from a spec sheet.

Coverage spans the current and previous generations: X14, X13 and X12 Intel platforms, H14, H13 and H12 AMD EPYC platforms, the A+ (AS-) series, SYS- SuperServer systems, SSG- storage servers, C9 and B-series boards, and bare MBD- motherboards. Modules ship as ECC RDIMM, LRDIMM, ECC and non-ECC UDIMM, and SODIMM depending on what the board takes.

Supermicro platforms are unforgiving about memory type — a board that wants ECC UDIMM will not post with non-ECC, and registered will not run in an unbuffered slot. Use Shop by System Model in the sidebar to filter to your exact board and see only modules that fit it.

Every Module carries a Lifetime Replacement Warranty. Purchase orders, net terms and volume pricing are available for business, government and education buyers — send us a build list and we'll quote the set.

Memory by Supermicro generation

The generation prefix on the board or system tells you the memory technology before you look anything else up. Within a generation the exact board decides RDIMM vs UDIMM, and the CPU decides the top supported speed.

SYS- (Intel SuperServer), AS- (A+ AMD SuperServer), SSG- (SuperStorage) and SuperWorkstation system numbers each map to a specific board; the generation digit in the system number (SYS-12, SYS-22, AS-11) is the chassis size, not the board generation. Use Shop by System Model to filter by the board or system directly.

How to read a Supermicro memory part number

Supermicro sells memory under its own MEM-DR part numbers. If you have a build list or a quote written in those numbers, decode it here and find the matching NEMIX RAM module, or use the cross-reference above.

MEM-DR   5    64    L   -SL01   -ER48
  |      |    |     |     |       |
  |      |    |     |     |       └─ type + speed: ER48 = ECC Registered 4800
  |      |    |     |     └───────── vendor + revision (S=Samsung, H=Hynix, M=Micron, C=Crucial)
  |      |    |     └─────────────── profile (L = standard)
  |      |    └───────────────────── capacity in GB
  |      └────────────────────────── generation: 4 = DDR4, 5 = DDR5
  └───────────────────────────────── Supermicro DRAM module

The vendor code identifies which DRAM maker Supermicro sourced that revision from; it is not a compatibility requirement. What the board checks is generation, capacity, type, speed, and rank, and that is what NEMIX RAM matches.

How to identify your board

1. From the BMC / IPMI web interface: System → Component Info (or System Information on older firmware) lists the board model, BIOS version, and every installed DIMM with capacity, speed, and part number. No downtime required.
2. From the OS: sudo dmidecode -t baseboard on Linux, or wmic baseboard get product in a Windows command prompt, returns the board model. dmidecode -t memory shows what is populated and where.
3. From the system number: a SYS- or AS- number on the chassis label maps to one board on Supermicro's product page under Motherboard.
4. On the board: the model is silk-screened near the DIMM slots or the PCIe slots.

Population rules that matter on Supermicro

• One memory type per board. RDIMM, LRDIMM, and UDIMM cannot be mixed. Registered modules in an unbuffered slot, or the reverse, produce a no-POST, not a warning. Every board's manual states the supported type on the first page of the memory section.
• Fill channels before doubling up. Modern Xeon and EPYC sockets have 6, 8, or 12 memory channels. Memory bandwidth scales with populated channels, so a single 64GB module leaves most of the socket idle. The manual's population table (typically the blue slots first, A1 → B1 → C1 …) is the order that keeps all channels active.
• Match speed and rank across the board. Mixed speeds run at the slowest module. Mixed ranks can force the controller to a lower speed or drop the DPC (DIMMs per channel) it will support. Identical modules across the board are the safe configuration, which is why this collection sells matched kits sized to the socket's channel count.
• Two DIMMs per channel costs speed on many platforms. DDR4-3200 boards commonly drop to 2933 at 2DPC; DDR5 platforms drop from 4800 to 4400. If you need the capacity, that trade is fine; if you need the bandwidth, fewer larger modules is the better path.
• Check the CPU's memory ceiling. The board may accept DDR5-5600 but a 4th Gen Xeon runs it at 4800. Lower-tier SKUs in each CPU family often top out one speed grade below the flagship.

Fleet, government, and education purchasing

NEMIX RAM is a registered federal supplier (UEI GV8MMYNDJ5J1, CAGE 59AB2). We accept purchase orders and offer net terms and volume pricing for business, government, and education buyers. Send a build list, a Supermicro quote, or a BOM in MEM-DR part numbers and we return a matched NEMIX RAM quote for the full set. Rack-scale orders are staged and shipped as one lot so every node receives identical modules from the same production run.

Why NEMIX RAM

NEMIX RAM has supplied server and workstation memory from the United States since 1993. Every module in this collection is matched to the specific Supermicro board or system it is listed for and carries a lifetime replacement warranty with free US-based technical support. Because we sell by the board rather than by generic spec, you get the type, speed, and rank the platform was designed around without paying the OEM margin for the same DRAM.

Frequently asked

The board supports both RDIMM and UDIMM. Which do I want? RDIMM for capacity and stability under full population; ECC UDIMM if the board is already populated with UDIMM or the manual restricts you to it. Never both.

Can I add modules to what is already installed? Yes, if you match the existing modules on type, capacity, speed, and rank. Check what is installed in the BMC first; the DIMM part numbers there tell you exactly what to match.

Does NEMIX RAM memory appear on Supermicro's tested memory list? Supermicro's list names the DRAM vendors it has qualified. Our modules are built on those same qualified DRAM and are tested in the target board before listing, and the lifetime warranty covers them regardless.

What if my board is not in the filter? The catalog covers the boards we have tested. If yours is missing, contact us with the board model and we will match it.

SUPERMICRO | OEM SKU | CROSS-REFERENCE

UEI Approved Supplier: GV8MMYNDJ5J1 CAGE CODE: 59AB2

NEMIX RAM can deliver any Configuration your Fleet Requires

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1-800-662-7466