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Two green DDR5 UDIMM sticks, no heat spreaders

NEMIX RAM

NEMIX RAM 64GB (2x32GB) DDR5 4800 CL40 1.1V 2Rx8 288-pin UDIMM memory upgrade for QNAP TS-H1277AXU-RP NAS

SKU CH-6KTC-ZY5QT

A 64 GB DDR5 4800 kit of two 32 GB unbuffered UDIMMs rated CL40 at 1.1 V, validated for the QNAP TS-H1277AXU-RP NAS

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeUnbuffered
  • Rated voltage1.1 V

Capacity 64GB 2X32GB

  • 64 GB dual-channel kit doubles NAS memory capacity
  • DDR5 4800 MT/s speed feeds data to QNAP TS-H1277AXU-RP workloads
  • CL40 latency at 1.1 V keeps power draw low
  • 2Rx8 288-pin unbuffered design matches NAS slot specification
  • Samsung Micron Hynix chips tested under load for stability

QNAP TS-H1277AXU-RP memory kit

This NEMIX RAM kit provides 64 GB of DDR5 memory across two 32 GB modules. It is built specifically for the QNAP TS-H1277AXU-RP NAS and runs at 4800 MT/s with CL40 timing at 1.1 V. The unbuffered non-ECC UDIMM design uses major OEM chips from Samsung, Micron or Hynix.

Ideal for NAS owners needing maximum capacity

The dual-rank 2Rx8 layout suits the TS-H1277AXU-RP when all slots are populated with 32 GB modules. It is not for systems that require registered ECC memory, nor for boards limited to single-rank or lower-density DDR5 DIMMs. Buyers who need error-correcting code support or registered modules should look elsewhere.

Straightforward DIMM installation

The 288-pin DDR5 UDIMMs slot into the NAS memory sockets without tools or cables. Because the kit is validated for the target model, compatibility issues are rare; the main risk is seating a module incompletely, which can prevent the system from posting. Following the NAS manual ensures correct orientation and firm insertion.

How it compares

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

Price $827.99
Pricier than about 58% 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 $12.94 per GB
Pricier than about 59% 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 lineQNAP NAS Compatible Series Memory
Model nameQNAP DDR5 4800 MHz Non-ECC Unbuffered UDIMM NAS Memory
Part numberMD38400-328K2
Total capacity64 GB (2 × 32 GB)
Product type288-Pin DDR5 UDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsQnap
In the box
Included items64 GB (2 × 32 GB) DDR5 4800 MHz PC5-38400 2Rx8 1.1 V CL40 288-PIN Non-ECC Unbuffered UDIMM KIT

Other versions of this model

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Questions about this item

Does this kit need an empty 288-pin DDR5 UDIMM slot on the QNAP TS-H1277AXU-RP to install?

Yes, each 32 GB module plugs into a standard 288-pin DDR5 UDIMM slot; the kit includes two modules so two free slots are required.

Will the DDR5 4800 CL40 modules run at their rated speed if I keep slower DDR5 already installed in the NAS?

The system will clock all installed memory to the lowest common speed; mixing slower modules will cause this kit to operate below 4800 MT/s.

How can I confirm the NAS recognises the full 64 GB kit at 4800 MT/s after installation?

Check the QNAP firmware memory information page — it should show 64 GB total capacity and a memory speed of 4800 MT/s with CL40 timings.

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