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Four green DDR5 UDIMM modules in a row

NEMIX RAM

NEMIX RAM 128GB (4x32GB) DDR5 4800 CL40 1.1V 2Rx8 UDIMM QNAP TS-H1277AXU-RP memory upgrade

SKU CH-BGYM-R9XX7

A 128 GB DDR5 memory kit of four 32 GB modules running at 4800 MT/s with CL40 latency, 1.1 V operation and 2Rx8 unbuffered design, validated for the QNAP TS-H1277AXU-RP NAS

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeUnbuffered
  • Rated voltage1.1 V

Capacity 128GB 4X32GB

  • 128 GB total capacity across four 32 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • CL40 CAS latency at 1.1 V operating voltage
  • 2Rx8 dual-rank 288-pin UDIMM unbuffered non-ECC design
  • validated for QNAP TS-H1277AXU-RP NAS compatibility

128GB DDR5 kit for QNAP TS-H1277AXU-RP

This 128GB kit contains four 32GB DDR5 4800 UDIMM modules built for the QNAP TS-H1277AXU-RP NAS. It targets administrators who need the maximum supported memory for virtualization, container workloads or large ZFS caches.

Verify DDR5 UDIMM slots and non-ECC support

Before ordering confirm the NAS has four free 288-pin DDR5 UDIMM slots and that the firmware accepts non-ECC unbuffered memory. The modules run at 1.1V with CL40 latency and are organised as 2Rx8 dual-rank chips.

Replaces smaller or slower DDR5 configurations

The kit replaces any lower-capacity DDR5 4800 kit or mixed-speed modules currently installed. The upgrade is worthwhile when the NAS hits memory limits during heavy multi-user file serving, VM hosting or deduplication tasks.

How it compares

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

Price $1,757.99
Pricier than about 66% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $13.73 per GB
Pricier than about 60% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineQNAP NAS Compatible Series Memory
Model nameQNAP DDR5 4800 MHz Non-ECC Unbuffered UDIMM NAS Memory
Part numberMD38400-328K4
Total capacity128 GB (4 × 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 items128 GB (4 × 32 GB) DDR5 4800 MHz PC5-38400 2Rx8 1.1 V CL40 288-PIN Non-ECC Unbuffered UDIMM KIT

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Questions about this item

Does the kit include all four 32 GB modules or do I need to buy additional sticks?

The kit ships with four 32 GB modules for a total of 128 GB, so no extra sticks are required.

Why choose the CL40 4800 MHz version instead of a lower-latency kit?

CL40 at 4800 MHz matches the QNAP TS-H1277AXU-RP memory controller specification, ensuring stable operation without manual tuning.

Will the 1.1 V 2Rx8 DDR5 modules run at the rated 4800 MHz in my TS-H1277AXU-RP?

Yes, the 1.1 V 2Rx8 DDR5 UDIMMs are validated for 4800 MHz operation in the TS-H1277AXU-RP and will run at that speed automatically.

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