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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

  • Capacity64GB (2 x 32GB)
  • SpeedDDR5 4800 (PC5 38400)
  • ECCNo
  • Buffered/RegisteredUnbuffered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.10V

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.

Highlights

  • 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

Specifications

BrandNEMIX RAM
SeriesQNAP NAS Compatible Series Memory
ModelQNAP DDR5 4800MHZ Non-ECC Unbuffered UDIMM NAS Memory
Part NumberMD38400-328K2
Capacity64GB (2 x 32GB)
SpeedDDR5 4800 (PC5 38400)
ECCNo
Buffered/RegisteredUnbuffered
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.10V
Compatible SystemQnap
CAS LatencyCL40
Heat SpreaderNo
Type288-Pin DDR5 UDIMM
Rank2Rx8
FeaturesDDR5 Non-ECC Unbuffered UDIMM Motherboard Compatible
Package Content64GB (2X32GB) DDR5 4800MHZ PC5-38400 2Rx8 1.1V CL40 288-PIN Non-ECC Unbuffered UDIMM KIT

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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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