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Green circuit board with black memory chips, gold edge connector, no heat spreader

NEMIX RAM

NEMIX RAM 16GB DDR4 2666 PC4-21300 CL19 2Rx8 1.2V 288-Pin UDIMM Supermicro Compatible memory upgrade

SKU CH-XA2X-R27MJ

A 16 GB DDR4 2666 MHz UDIMM module with CL19 latency and 1.2 V operation for Supermicro systems

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • 16 GB DDR4 2666 MHz boosts system responsiveness
  • CL19 latency and 1.20 V operation balance speed with efficiency
  • 2Rx8 dual-rank organisation improves memory throughput
  • 288-pin UDIMM fits Supermicro MEM-DR416L-HL01-UN26 slots directly
  • Non-ECC unbuffered design keeps installation simple and reliable

16 GB DDR4-2666 module for Supermicro systems

This 16 GB DDR4 2666 PC4-21300 UDIMM is built for Supermicro desktop and workstation platforms. It delivers 16 GB of non-ECC unbuffered memory in a single 288-pin module. The CL19 latency and 1.20 V operation suit standard DDR4 workloads. IT professionals choose this part for verified compatibility with Supermicro MEM-DR416L-HL01-UN26 configurations.

Before ordering check your motherboard manual

Verify the board accepts DDR4 2666 UDIMM modules and supports 2Rx8 density. Confirm the memory slots are 288-pin DDR4 and that the system does not require ECC or registered DIMMs. Ensure the BIOS is updated to recognise 16 GB single-rank or dual-rank modules. Check the maximum supported capacity per slot and total system limit.

Fits standard DDR4 UDIMM slots with no heat spreader

The module installs directly into any 288-pin DDR4 UDIMM slot without clearance issues. Its low-profile design leaves room for large CPU coolers or tight chassis layouts. The 1.20 V rating keeps power draw modest alongside other DDR4 sticks. Use it to add 16 GB to a compatible Supermicro workstation or to replace a failed module in an existing array.

How it compares

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

Price $92.99
Cheaper than about 68% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $5.81 per GB
Cheaper than about 67% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Product lineSuperMicro Server/Workstation Compatible Series Memory
Model nameSupermicro DDR4 2666 MHz Non-ECC Unbuffered UDIMM
Part numberMD21300-628K1
Total capacity16 GB
Product type288-Pin DDR4 UDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSupermicro
In the box
Included items16 GB (1 × 16 GB) DDR4 2666 MHz PC4-21300 2Rx8 1.2 V CL19 288-PIN Non-ECC Unbuffered UDIMM

Questions about this item

What is included in the box and is anything else needed to install this memory?

The box contains one 16GB DDR4 2666MHz CL19 2Rx8 1.2V 288-pin UDIMM module. No extra parts are required for a compatible Supermicro desktop or workstation.

How do I decide between the available versions or capacities of this NEMIX RAM module?

This listing is a single 16GB 2666MHz CL19 2Rx8 1.2V UDIMM. Choose it when your Supermicro system needs a 16GB non-ECC unbuffered DDR4 module at that speed and latency.

What does the PC4-21300 rating mean for real-world performance in a Supermicro machine?

PC4-21300 identifies the module as DDR4-2666 with CL19 timing. It will run at 2666 MT/s on a supported Supermicro platform, delivering the rated bandwidth for that speed grade.

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