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Green circuit board with black memory chips, no heat spreader, 288-pin DDR5 UDIMM

NEMIX RAM

NEMIX RAM 16GB DDR5 4800 CL40 1Rx8 UDIMM QNAP TS-H1677AXU-RP memory upgrade

SKU CH-36N0-HTDV5

A 16 GB DDR5 module running at 4800 MT/s with CL40 latency, built for the QNAP TS-H1677AXU-RP NAS

  • Total capacity16 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeUnbuffered
  • Rated voltage1.1 V

Capacity 16GB

  • 16 GB DDR5 4800 MT/s boosts NAS responsiveness
  • CL40 CAS latency keeps data flowing smoothly
  • 1 V operation reduces power draw and heat
  • Single-rank 1Rx8 layout simplifies memory controller load
  • 288-pin UDIMM fits QNAP TS-H1677AXU-RP directly

QNAP TS-H1677AXU-RP memory upgrade

This 16GB DDR5 module is built specifically for the QNAP TS-H1677AXU-RP NAS. It runs at 4800 MT/s with a CAS latency of CL40 and operates at 1.1V. The single-rank 1Rx8 unbuffered design uses major OEM chips from Samsung, Micron or Hynix and fits a standard 288-pin UDIMM slot.

NAS administrators adding capacity

Administrators who need to expand the memory of a TS-H1677AXU-RP will find this module validated for that platform. It is not suitable for systems that require ECC error correction, registered buffering or a different DDR generation, and it lacks a heat spreader for builds that demand one.

Sustained NAS workloads

All modules are stress tested under load to verify stability during continuous file serving, virtualization or backup tasks. The 1.1V operating voltage keeps power draw consistent over long periods, and the unbuffered topology avoids extra latency in steady-state operation.

How it compares

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

Price $181.99
Cheaper than about 59% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $11.37 per GB
Pricier than about 56% 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 numberMD38400-618K1
Total capacity16 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 rank1Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsQnap
In the box
Included items16 GB (1 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN Non-ECC Unbuffered UDIMM

Other versions of this model

5 more in the same range

Questions about this item

Will my QNAP TS-H1677AXU-RP accept this 16 GB DDR5 4800 UDIMM without any other hardware changes?

Yes — the module is built for that NAS and plugs straight into a free 288-pin DDR5 slot; no extra parts are required.

Can I leave the original memory in place and add this 1Rx8 CL40 stick to the remaining slots?

The NAS supports mixed populations, so you can keep the factory modules and add this 16 GB DDR5 4800 stick in an empty slot.

After installation, how do I confirm the new 16 GB DDR5 4800 module is recognised at 4800 MT/s?

Open the QNAP web UI, go to System Information → Memory, and verify the total shows the extra 16 GB running at 4800 MT/s.

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