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Two green DDR4 UDIMM sticks without heat spreaders

NEMIX RAM

NEMIX RAM 64GB (2x32GB) DDR4 3200 CL22 1.2V 288-Pin UDIMM ASRock B660M

SKU CH-BXHH-S1G0Y

A 64 GB dual-channel DDR4 kit rated at 3200 MT/s CL22 for ASRock B660M 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 total capacity from two 32 GB modules
  • DDR4 3200 speed rated at PC4-25600 bandwidth
  • CL22 latency at standard 1.20 V operation
  • 288-pin UDIMM form factor fits desktop slots
  • Tested compatible with ASRock B660M series motherboards

Capacity and Compatibility

This NEMIX RAM kit delivers 64GB of DDR4 memory across two 32GB UDIMM modules. It is built for ASRock B660M motherboards including the PG Riptide, Phantom Gaming 4 and Pro RS models. The 288-pin unbuffered non-ECC design fits standard desktop DIMM slots.

Who This Suits

Builders upgrading an ASRock B660M board to 64GB with a matched pair of modules will find this kit validated for those specific models. Buyers who need ECC error correction, registered modules or a different motherboard platform should look elsewhere.

Deciding Specification

The modules run at DDR4 3200 (PC4-25600) with CL22 latency at 1.20V using a 2Rx8 organisation. This speed and timing combination determines whether the kit matches the memory controller requirements of the target board.

How it compares

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

Price $342.99
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 $5.36 per GB
Cheaper than about 72% 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 lineASRock Gaming Motherboard Compatible Series Memory
Model nameASRock DDR4 3200 MHz Non-ECC Unbuffered UDIMM
Part numberMD25600-328K2
Total capacity64 GB (2 × 32 GB)
Product type288-Pin DDR4 UDIMM
Performance
Rated speedDDR4 3200 (PC4 25600)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL22
ECC supportNo
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 Non-ECC Unbuffered UDIMM KIT

Questions about this item

Does this 288-pin UDIMM kit fit the four DIMM slots on my ASRock B660M motherboard?

Yes, the kit contains two 32 GB modules built to the standard 288-pin DDR4 UDIMM form factor that matches the four slots on ASRock B660M boards.

What is the correct way to seat both 32 GB sticks so the board runs at 3200 MT/s CL22?

Install the two modules in the same-colour slots — usually slots 2 and 4 — press straight down until the retention clips click, then enable the XMP profile in BIOS to lock in 3200 MT/s CL22 at 1.2 V.

Will the Samsung, Micron or Hynix chips on these modules need any cooling or replacement over time?

The modules have no heat spreader and run at the standard 1.2 V; no active cooling or periodic replacement is required under normal desktop workloads.

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