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Four green DDR4 RDIMM modules with black chips and gold contacts

NEMIX RAM

NEMIX RAM DDR4 ECC RDIMM 256GB (4x64GB) 2933MHz CL21 2Rx4 1.2V 288-Pin Registered Memory Upgrade

SKU CH-3C8J-EAFJS

A 256GB registered ECC DDR4 kit of four 64GB modules at 2933MHz CL21 1.2V for the ASUS WS C621E SAGE workstation motherboard

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR4 2933 (PC4 23400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeRegistered

Size 256GB 4X64GB

  • 256 GB kit populates four slots at full rated speed
  • 2933 MHz DDR4 matches the controller spec exactly
  • Registered ECC design corrects single-bit errors on the fly
  • 20 V operation keeps power draw low per module
  • 288-pin RDIMM form factor fits the ASUS WS C621E SAGE motherboard

Exact-match server upgrade

This kit delivers 256GB of DDR4 ECC registered memory in four 64GB modules built to the precise rank, voltage and timing the memory controller expects. It is intended for administrators upgrading an ASUS WS C621E SAGE workstation that requires fully populated registered DIMM slots at rated speed.

DDR4-2933 registered limits

The DDR4-2933 registered interface tops out at this data rate and requires a motherboard wired for 288-pin RDIMMs; unbuffered or SO-DIMM modules will not fit or function. Population rules on the target board dictate which slots must be filled first, so full 256GB capacity is only reached when the manual's approved order is followed.

Replaces partial or slower kits

This kit replaces smaller-capacity or mixed-speed DDR4 registered sets that leave slots empty or force the controller to down-clock. The jump is worth it when the workload needs the full 256GB at 2933MHz with ECC protection and the board's population guide confirms four 64GB 2Rx4 modules are supported.

How it compares

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

Price $1,609.99
Pricier than about 65% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $6.29 per GB
Cheaper than about 63% 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 nameDDR4 ECC RDIMM Registered Server Memory
Part numberMR23400-924K4
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR4 RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL21
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsASUS
In the box
Included items256 GB 4 × 64 GB DDR4 2933 MHz PC4-23400 2Rx4 1.2 V 288-PIN ECC RDIMM KIT

Other versions of this model

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Questions about this item

Should I choose the 256GB kit or buy single 64GB modules to fill the ASUS WS C621E SAGE?

The 256GB kit provides four matched 64GB RDIMMs tested together for 2Rx4 rank consistency, ensuring the memory controller recognises the full capacity at DDR4-2933 without population-order issues.

What does the 2933MHz rating mean once the kit is installed in the workstation?

The modules run at DDR4-2933 (PC4-23400) with CL21 latency at 1.2V, delivering the exact bandwidth and timing the C621E chipset expects when all four slots are populated.

How does the 288-pin RDIMM interface affect maximum capacity on this motherboard?

Registered DIMMs buffer address and command signals, allowing the board to run all four slots at 64GB each for 256GB total, while ECC corrects single-bit errors in real time.

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