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Four green DDR4 UDIMM sticks without heat spreaders

NEMIX RAM

NEMIX RAM 128GB (4x32GB) DDR4 3200 CL22 ECC UDIMM for ASRock Rack X570D4U memory upgrade

SKU CH-WDQB-K4B4Z

128 GB DDR4 ECC UDIMM kit at 3200 MHz CL22, 1.2 V, 288-pin for ASRock Rack X570D4U

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR4 3200 (PC4 25600)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL22
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • 128GB total capacity across four 32GB modules
  • DDR4 3200 speed with PC4-25600 bandwidth rating
  • ECC unbuffered UDIMM for data integrity in servers
  • CL22 latency at 1.2V standard operating voltage
  • Validated for ASRock Rack X570D4U motherboard compatibility

Compatible DDR4 ECC UDIMM kit for ASRock Rack

This 128GB kit contains four 32GB DDR4 3200 modules built for ASRock Rack X570D4U, X570D4U-2L2T and X570D4U-2L2T/BCM motherboards. Each stick runs at 1.20V with CL22 timing and uses 2Rx8 unbuffered ECC chips. The 288-pin UDIMM form factor fits the board's standard slots.

Suits servers and workstations needing maximum ECC

Builders filling all four slots on the supported X570D4U variants will reach the platform's 128GB limit with this kit. Systems requiring registered or load-reduced modules cannot use these unbuffered DIMMs. Buyers needing more than 128GB must choose a different motherboard platform.

DDR4 3200 CL22 2Rx8 unbuffered ECC specification

The modules operate at DDR4 3200 (PC4-25600) with a CAS latency of 22 and a 2Rx8 organisation. Unbuffered ECC design provides error correction without the register delay of registered DIMMs. This exact speed, rank and buffering combination is what the X570D4U memory controller expects.

How it compares

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

Price $973.99
Pricier than about 60% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $7.61 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 numberME25600-328K4
Total capacity128 GB (4 × 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 items128 GB (4 × 32 GB) DDR4 3200 MHz PC4-25600 2Rx8 1.2 V CL22 288-PIN ECC Unbuffered UDIMM KIT

Questions about this item

What comes in the box and is anything else needed for installation?

The kit contains four 32 GB DDR4 3200 ECC UDIMM modules. No extra parts are required; install them directly into the motherboard slots.

Should I choose the 4×32 GB kit or a different capacity for the ASRock Rack X570D4U?

This 128 GB kit (4×32 GB) fills all four slots on the X570D4U. Select it when you need the maximum supported capacity; choose a smaller kit only if you plan to leave slots empty.

How does the CL22 3200 MT/s rating affect real-world performance in this server board?

The modules run at 3200 MT/s with 22-cycle CAS latency at 1.2 V, delivering the rated throughput and error correction the X570D4U expects for stable server workloads.

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