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Two green DDR4 UDIMM modules, no heat spreaders, gold contacts visible

NEMIX RAM

NEMIX RAM 16GB (2x8GB) DDR4 3200 ECC UDIMM CL22 1.2V 288-pin ASRock EPYC3451D4U-2L2T2O8R memory upgrade

SKU CH-DV03-JJ83E

DDR4 3200 ECC UDIMM kit adds 16 GB in two 8 GB modules at CL22 and 1.2 V for the ASRock EPYC3451D4U-2L2T2O8R

  • Total capacity16 GB (2 × 8 GB)
  • Rated speedDDR4 3200 (PC4 25600)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL22
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • 16GB dual-channel kit boosts server throughput
  • DDR4 3200 CL22 timing matches platform spec
  • ECC unbuffered design protects data integrity
  • 20V operation reduces power draw
  • Validated for ASRock EPYC3451D4U-2L2T2O8R motherboard

System-Specific DDR4 ECC Kit

This 16 GB kit contains two 8 GB DDR4 3200 UDIMMs built for the ASRock Rack EPYC3451D4U-2L2T2O8R motherboard. ECC unbuffered operation protects data integrity in always-on server and workstation roles. The modules run at 1.2 V with CL22 timing and use major OEM DRAM from Samsung, Micron or Hynix. No heat spreader is fitted.

Build Integration Notes

Each stick occupies a single 288-pin DDR4 slot and requires no extra power or cooling beyond standard airflow. The unbuffered design keeps the memory controller simple and leaves registered DIMM slots free for other configurations. Installing the pair in matched channels lets the platform reach the rated PC4-25600 throughput without manual tuning.

Upgrade Context

The kit replaces lower-capacity or non-ECC DDR4 modules that limit error detection or total memory headroom. Moving from a single 8 GB stick to this dual-channel 16 GB set doubles bandwidth and adds ECC coverage for critical workloads. The jump is worthwhile when the board supports 3200 MT/s and the application benefits from corrected single-bit errors.

How it compares

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

Price $131.99
Cheaper than about 64% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB (2 × 8 GB)
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $8.25 per GB
Typical for this category: the median of 20,941 items is $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 lineASRock Server Motherboard Compatible Series Memory
Model nameASRock DDR4 3200 MHz ECC Unbuffered UDIMM
Part numberME25600-818K2
Total capacity16 GB (2 × 8 GB)
Product type288-Pin DDR4 ECC UDIMM
Performance
Rated speedDDR4 3200 (PC4 25600)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL22
ECC supportYes
Buffer typeUnbuffered
Heat spreaderNo
Memory rank1Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsASRock
In the box
Included items16 GB (2 × 8 GB) DDR4 3200 MHz PC4-25600 1Rx8 1.2 V CL22 288-PIN ECC Unbuffered UDIMM KIT

Questions about this item

What CAS latency does the CL22 rating impose under sustained loads?

The kit runs at CL22, so every column access adds twenty-two cycles of latency before data is returned.

How much heat do the 1.2 V unbuffered modules generate when running continuously?

At 1.20 V with no heat spreader the modules run cool enough for standard server airflow; no active cooling is required.

Which motherboard must already be installed for this kit to work?

The memory is validated for the ASRock Rack EPYC3451D4U-2L2T2O8R motherboard with 288-pin DDR4 slots.

More in Model-Specific Memory Upgrades

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