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Sixteen green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM 256GB 16x16GB DDR5 4800 ECC RDIMM CL40 1.1V 1Rx8 Supermicro H13DSG-O-CPU-D memory upgrade

SKU CH-FJSW-X5EMT

256 GB DDR5 server kit with 16 registered ECC modules at 4800 MT/s, CL40 and 1.1 V, built for the Supermicro H13DSG-O-CPU-D motherboard

  • Total capacity256 GB (16 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 256GB 16X16GB

Show 30 more
  • 256 GB kit fills every slot at rated speed
  • 16 matched 16 GB modules keep all channels balanced
  • DDR5 4800 CL40 at 1.1 V meets controller spec
  • Registered ECC corrects single-bit errors on the fly
  • 288-pin RDIMM form factor fits Supermicro H13DSG-O-CPU-D

256GB DDR5-4800 ECC RDIMM kit for Supermicro

This 16-module kit delivers 256GB of registered DDR5 memory at 4800 MT/s with CL40 latency and 1.1V operation. It is built for servers that require ECC error correction and registered signal buffering to run every slot populated at full rated capacity. The 1Rx8 organization matches the memory controller expectations for this specific motherboard.

Verify DIMM population rules

Server memory support varies by model and BIOS revision. Consult the Supermicro H13DSG-O-CPU-D documentation for approved population order, maximum capacity per channel, and any required firmware updates before installing a full 16-DIMM configuration. Incorrect population can prevent boot or limit usable memory.

Kit provides exact-match modules for full 256GB

The package contains sixteen 16GB RDIMMs pre-validated as a matched set, eliminating the risk of mixing revision codes or rank configurations that cause instability. No heat spreaders are included, so airflow in your chassis must be sufficient for bare modules running at 1.1V across all slots.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $7,157.99
Pricier than about 83% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (16 × 16 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $27.96 per GB
Pricier than about 78% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR38400-618K16
Total capacity256 GB (16 × 16 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items256 GB 16 × 16 GB DDR5 4800 MHz PC5-38400 1Rx8 1.1 V 288-PIN ECC RDIMM KIT

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Questions about this item

Does the 256GB kit arrive as 16 separate 16GB DDR5 RDIMMs, or must additional modules be purchased to reach that capacity?

The package contains 16 individual 16GB DDR5 4800 RDIMMs, giving 256GB total with nothing else to buy.

Should I select the 1Rx8 CL40 1.1V version or are other ranks, latencies or voltages offered for this board?

This kit is the exact-match 1Rx8 CL40 1.1V specification the Supermicro H13DSG-O-CPU-D memory controller expects; no alternative ranks, latencies or voltages are listed.

Will the DDR5 4800 (PC5-38400) rating run at that speed when all 16 slots of the H13DSG-O-CPU-D are populated?

Registered ECC architecture offloads the memory controller so every slot runs fully populated at the rated DDR5 4800 speed.

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