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Two green DDR4 UDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM 64GB (2x32GB) DDR4 2666 CL19 1.2V 2Rx8 UDIMM memory upgrade for Supermicro MBD-C9Z390CG-IW

SKU CH-MRPQ-Y0CHA

A 64 GB DDR4 2666 kit of two 32 GB UDIMMs built for the Supermicro MBD-C9Z390CG-IW

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • 64 GB total capacity with two 32 GB modules
  • DDR4 2666 MT/s speed rated at PC4-21300
  • Low 1.2 V operating voltage for efficient power use
  • CL19 CAS latency and 2Rx8 dual-rank organisation
  • Validated compatibility with Supermicro MBD-C9Z390CG-IW workstation board

Compatible DDR4 upgrade for Supermicro

This 64 GB kit supplies two 32 GB UDIMM modules validated for the Supermicro MBD-C9Z390CG-IW motherboard. It runs at DDR4 2666 with CL19 timings and 1.20 V, using 2Rx8 non-ECC unbuffered chips from major OEM suppliers.

288-pin UDIMM form factor and matched pair

The modules use the standard 288-pin DDR4 UDIMM layout and ship as a tested pair, so they install directly into the board's memory slots without extra cables, brackets or software. The matched configuration enables dual-channel operation for the platform.

Verify two free slots and DDR4 2666 support

Confirm the motherboard has two available DDR4 UDIMM slots and that the BIOS accepts 32 GB non-ECC unbuffered modules at 2666 MT/s. Systems limited to lower densities, registered memory only, or a different memory generation cannot use this kit.

How it compares

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

Price $294.99
Cheaper than about 54% of the 21,161 comparable items (median $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 $4.61 per GB
Cheaper than about 81% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineSuperMicro Server/Workstation Compatible Series Memory
Model nameSupermicro DDR4 2666 MHz Non-ECC Unbuffered UDIMM
Part numberMD21300-328K2
Total capacity64 GB (2 × 32 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 items64 GB (2 × 32 GB) DDR4 2666 MHz PC4-21300 2Rx8 1.2 V CL19 288-PIN Non-ECC Unbuffered UDIMM KIT

Questions about this item

Will the 2Rx8 DDR4 modules need any firmware updates or re-seating after long uptime?

No firmware is involved with these unbuffered DDR4 UDIMMs; the 2Rx8 organisation is handled by the memory controller. If a module ever needs re-seating, power down, remove and re-insert the 288-pin sticks.

What limit appears first when the 64 GB kit runs at 2666 MT/s continuously?

The CAS latency of CL19 at 1.20 V sets the timing envelope; sustained throughput is bounded by the DDR4 2666 (PC4-21300) data rate rather than thermal throttling.

How much heat and power do the two 32 GB sticks produce during all-day workloads?

Each module operates at the standard DDR4 1.20 V without a heat spreader, so power draw stays at the JEDEC baseline for 2666 MT/s and the bare PCB dissipates heat passively.

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