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Two green DDR4 UDIMM sticks, black chips, no heat spreaders

NEMIX RAM

NEMIX RAM 64GB (2x32GB) DDR4-2666 ECC UDIMM CL19 1.2V 2Rx8 memory upgrade

SKU CH-ZD5A-V4RRD

64GB DDR4-2666 ECC UDIMM kit with CL19 timing for ASUS WS C246M PRO workstations

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered

Size 64GB 2X32GB

  • 64 GB capacity in a matched 2 × 32 GB kit for full system memory
  • DDR4-2666 speed with CL19 timing delivers rated bandwidth for workstation workloads
  • ECC UDIMM corrects single-bit errors on the fly to prevent silent data corruption
  • 2 V operation matches the motherboard memory controller specification exactly
  • 288-pin unbuffered form factor fits ASUS WS C246M PRO and PRO/SE boards precisely

Exact-Match Upgrade Kit

This 64GB kit contains two 32GB DDR4 ECC UDIMM modules rated at 2666MHz with CL19 latency and 1.20V operation. It is built for workstations that require error-correcting unbuffered memory in a 288-pin form factor. The 2Rx8 rank configuration matches the memory controller expectations for compatible ASUS WS C246M PRO series motherboards.

Verified Fitment Steps

Installation follows standard UDIMM procedure: power down, open the chassis, align the notch with the 288-pin slot, and press firmly until the retention clips engage. The most common issue is ignoring the motherboard manual's specific DIMM population order, which can prevent the system from recognising the full 64GB capacity or booting at the rated 2666MHz speed.

ECC Unbuffered Requirement

This kit only works in systems that support DDR4 ECC Unbuffered UDIMM memory; it is physically and electrically incompatible with Registered RDIMM or SODIMM slots. Buyers whose motherboards require registered memory or non-ECC modules cannot use this product.

How it compares

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

Price $466.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 64 GB (2 × 32 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $7.30 per GB
Cheaper than about 55% 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 Memory
Model nameDDR4 ECC Unbuffered UDIMM Memory
Part numberME21300-328K2
Total capacity64 GB (2 × 32 GB)
Product type288-Pin DDR4 ECC UDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsASUS
In the box
Included items64 GB 2 × 32 GB DDR4 2666 MHz PC4-21300 2Rx8 1.2 V 288-PIN ECC UDIMM KIT

Other versions of this model

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Questions about this item

How can I verify the kit is running at DDR4-2666 CL19 with ECC active after installation?

Enter the UEFI or use a tool like CPU-Z and confirm the memory frequency shows 2666 MT/s, timings read 19-19-19, voltage is 1.20 V, and ECC status reports enabled for the full 64 GB.

What exactly ships in the package and is any extra hardware required?

The box contains two 32 GB 288-pin DDR4 ECC UDIMM modules — no heat spreaders, cables, or tools are included and none are needed for installation.

Why choose this 64 GB 2Rx8 kit over a single 32 GB module or a 4-module set?

This 2 x 32 GB 2Rx8 kit matches the ASUS WS C246M PRO population rules for dual-channel operation at the rated 2666 MHz speed, while a single DIMM would run single-channel and four DIMMs may exceed the board's validated rank limit.

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