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Two green DDR5 RDIMM modules with black chips, no heat spreaders, 288 pins each

NEMIX RAM

NEMIX RAM THINKMATE DDR5 4800 CL40 256GB (2x128GB) ECC RDIMM memory upgrade

SKU CH-D479-B23BJ

DDR5 4800 ECC registered server memory kit with two 128 GB modules at CL40 1.1 V for Thinkmate Supermicro 111E-WR systems

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB total capacity from two 128 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered RDIMM protects data integrity in servers
  • Low 1.10 V operation reduces power draw
  • Validated for ThinkMate Supermicro SuperServer 111E-WR

ThinkMate DDR5 4800 ECC RDIMM kit

This 256 GB registered DDR5 kit is built for ThinkMate Supermicro SuperServer 111E-WR systems that require error-correcting memory. It targets IT teams upgrading production servers or workstations where data integrity and platform validation matter more than raw speed.

256 GB in two 128 GB modules at CL40

The kit delivers 256 GB total capacity across two 288-pin 4Rx4 modules running at 4800 MT/s (PC5-38400) with 1.10 V operation. Headroom covers large virtualization clusters, in-memory databases and multi-tenant workloads; limits appear when applications demand lower latency timings or higher transfer rates than the JEDEC base specification provides.

Registered ECC RDIMM form factor

The modules use a registered ECC RDIMM design that only works in motherboards wired for registered DDR5 DIMMs. Systems expecting unbuffered UDIMMs or non-ECC memory will not post with this kit installed.

How it compares

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

Price $7,110.99
Pricier than about 83% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $27.78 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 lineTHINKMATE Server/Workstation Compatible Series Memory
Model nameTHINKMATE DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-744K2
Total capacity256 GB (2 × 128 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
Heat spreaderNo
Memory rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsTHINKMATE
In the box
Included items256 GB (2 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Will this 4800 MHz DDR5 ECC RDIMM run at full speed in my THINKMATE 111E-WR server alongside existing DDR5-4800 modules?

Yes, the kit is validated for the THINKMATE Supermicro SuperServer 111E-WR and operates at DDR5 4800 (PC5-38400) with CL40 latency at 1.1 V, so it will match the speed and timing of other DDR5-4800 modules in that platform.

How can I confirm the 256 GB (2 x 128 GB) kit is detected correctly with ECC active after installation?

Enter the system BIOS or UEFI and verify that all 256 GB appears as registered ECC memory running at 4800 MT/s with CL40 timings; the server's POST memory test will also report ECC status for each 288-pin 4Rx4 module.

Does the MR38400-744K2 package include only the two 128 GB RDIMMs, or are any brackets or cables supplied?

The package contains only the two 128 GB DDR5 4800 ECC RDIMM modules; no heat spreaders, brackets, cables or additional accessories are included.

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