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Two green 288-pin DDR4 UDIMM sticks without heat spreaders

NEMIX RAM

NEMIX RAM 64GB (2x32GB) DDR4 3200 CL22 ECC UDIMM Kit for ASRock Rack B550D4 memory upgrade

SKU CH-P6H2-H8XKP

A 64 GB dual-channel DDR4 3200 ECC UDIMM kit built for ASRock Rack B550D4 motherboards

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR4 3200 (PC4 25600)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL22
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • 64 GB capacity expands server memory headroom
  • ECC UDIMM protects data integrity in critical workloads
  • DDR4 3200 CL22 delivers responsive throughput at 1.2 V
  • 2Rx8 dual-rank organisation maximises density per slot
  • Validated for ASRock Rack B550D4 series motherboards

64GB DDR4 ECC UDIMM kit for ASRock Rack B550D4

This 64GB kit delivers 2x32GB DDR4 3200 ECC unbuffered UDIMM modules built for ASRock Rack B550D4 motherboards. It targets administrators and integrators who need validated, error-correcting memory for server or workstation workloads on these specific boards. The modules run at 1.2V with CL22 latency and 2Rx8 organisation.

No heat spreader and strict board validation

The modules ship without heat spreaders, relying on chassis airflow in 1U or dense configurations. Each stick is tested for compatibility with the listed B550D4 variants, reducing the risk of POST failures or silent data corruption. The kit includes only the two UDIMMs; no additional cables, brackets or software are supplied.

Suits B550D4 builds needing 64GB ECC.

This kit fits users expanding an ASRock Rack B550D4 system to 64GB with ECC protection. Builders using consumer boards without ECC support, or those requiring registered DIMMs, higher speeds, lower latency or heat-spreader-equipped modules should select a different product.

How it compares

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

Price $502.99
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 $7.86 per GB
Typical for this category: the median of 20,941 items is $8.19 per GB.

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Specifications

Product
Brand nameNEMIX RAM
Product lineASRock Server Motherboard Compatible Series Memory
Model nameASRock DDR4 3200 MHz ECC Unbuffered UDIMM
Part numberME25600-328K2
Total capacity64 GB (2 × 32 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 rank2Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsASRock
In the box
Included items64 GB (2 × 32 GB) DDR4 3200 MHz PC4-25600 2Rx8 1.2 V CL22 288-PIN ECC Unbuffered UDIMM KIT

Questions about this item

Will the 2Rx8 DDR4 modules need any firmware updates or reconfiguration after installation in the ASRock Rack B550D4?

The kit arrives at 1.20V with CL22 timings and is validated for the B550D4 series; no firmware updates or manual reconfiguration are required — install the 288-pin UDIMMs and the board will train them automatically.

What is the first limit reached when the 64GB kit runs sustained workloads on the B550D4?

The modules are rated DDR4 3200 (PC4-25600) with CL22 latency; under continuous load the CAS 22 timing ceiling is reached before any voltage or thermal throttle occurs.

How much heat and power do the two 32GB sticks draw when the system runs all day?

Each stick operates at 1.20V without a heat spreader; total kit power stays at the standard DDR4 1.2V level and passive airflow in a server chassis keeps temperatures within normal operating range.

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