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Four green DDR5 RDIMM modules without heat spreaders in a kit

NEMIX RAM

NEMIX RAM MR51200-744K4 512GB 4x128GB DDR5 6400 CL52 4Rx4 Registered ECC RDIMM memory upgrade

SKU CH-K3BM-6S3K6

512 GB DDR5-6400 ECC Registered RDIMM kit (four 128 GB modules) validated for the Supermicro X14SDW-36CE-SP9F motherboard

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 512GB 4X128GB

  • 512 GB total capacity from four 128 GB modules for maximum server memory density
  • DDR5 6400 speed with CL52 latency delivers rated bandwidth for demanding workloads
  • Registered ECC architecture offloads the memory controller and corrects single-bit errors automatically
  • 10 V operating voltage matches the motherboard's DDR5 power specification exactly
  • Validated for the Supermicro X14SDW-36CE-SP9F with 288-pin RDIMM form factor and 4Rx4 rank configuration

Exact-Match Server Kit

This 512GB kit contains four 128GB DDR5 RDIMM modules built to the exact rank, voltage and timing the Supermicro X14SDW-36CE-SP9F memory controller expects. The registered ECC design ensures full-capacity recognition at the rated 6400MT/s speed without manual tuning.

Capacity and Headroom

Four 4Rx4 modules deliver 512GB of registered ECC memory, allowing every slot to run fully populated while the buffered architecture offloads the memory controller. ECC corrects single-bit errors on the fly, preventing silent data corruption and unplanned reboots in production workloads.

Build and Day-to-Day Implications

Modules use major OEM Samsung, Micron or Hynix chips and operate at 1.1V without heat spreaders, relying on server chassis airflow for cooling. The 288-pin RDIMM form factor fits only boards wired for registered memory; UDIMM or SODIMM slots will not accept them. Consult the system manual for approved population order before installation.

How it compares

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

Price $17,981.99
Pricier than about 91% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (4 × 128 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $35.12 per GB
Pricier than about 90% 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 numberMR51200-744K4
Total capacity512 GB (4 × 128 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 6400 (PC5 51200)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL52
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items512 GB 4 × 128 GB DDR5 6400 MHz PC5-51200 4Rx4 1.1 V 288-PIN ECC RDIMM KIT

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Questions about this item

Will the 4Rx4 registered ECC RDIMM modules work with the Supermicro X14SDW-36CE-SP9F motherboard I already have?

The kit is verified for the Supermicro X14SDW-36CE-SP9F motherboard and uses the exact 288-pin registered DDR5 form factor and 1.1V voltage that board requires.

How can I confirm the 512GB kit is running at DDR5 6400 with CL52 after installation?

Check the BIOS memory information screen; it should show 6400 MT/s, CL52 timings, 1.10V and all four 128GB modules recognised as 4Rx4 registered ECC.

What comes in the MR51200-744K4 box and do I need any extra parts?

The box contains the 512GB kit of four 128GB DDR5 6400 CL52 4Rx4 1.1V ECC registered RDIMM modules; no additional components are required for installation.

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