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Two green DDR5 UDIMM modules, no heat spreaders

NEMIX RAM

NEMIX RAM 32GB (2x16GB) DDR5 4800 CL40 1.1V 288-pin UDIMM QNAP TS-H1277AXU-RP memory upgrade

SKU CH-8FSK-9ATCZ

A 32 GB DDR5 kit with two 16 GB modules running at 4800 MT/s and CL40 latency, built for the QNAP TS-H1277AXU-RP NAS

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeUnbuffered
  • Rated voltage1.1 V

Capacity 32GB 2X16GB

  • 32 GB dual-channel kit expands NAS capacity
  • DDR5 4800 speed boosts data throughput
  • CL40 latency at 1.1 V keeps power low
  • 288-pin UDIMM fits QNAP TS-H1277AXU-RP
  • Major OEM chips deliver validated reliability

Capacity and compatibility

This kit delivers 32GB of DDR5 memory in two 16GB modules built for the QNAP TS-H1277AXU-RP NAS. It targets administrators who need to expand system memory without replacing the original configuration.

Kit contents and specification

The package contains a matched pair of 288-pin UDIMM modules rated at 4800 MT/s with CL40 timings at 1.10V. Non-ECC unbuffered design and 1Rx8 organisation match the platform requirements for stable operation.

Installation notes

Modules install in the standard UDIMM slots and the kit is validated for the target NAS model. The main risk is mixing these sticks with existing memory of different speed, voltage or rank, which can prevent the system from booting.

How it compares

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

Price $384.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 32 GB (2 × 16 GB)
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $12.03 per GB
Pricier than about 57% 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 numberMD38400-618K2
Total capacity32 GB (2 × 16 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 items32 GB (2 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN Non-ECC Unbuffered UDIMM KIT

Other versions of this model

5 more in the same range

Questions about this item

Will the 1Rx8 DDR5 modules need any firmware updates or thermal pads added later?

The kit ships as non-ECC unbuffered UDIMMs with no heat spreader; no firmware is required and the modules are validated for the QNAP TS-H1277AXU-RP without extra thermal material.

What speed ceiling appears first when the NAS runs sustained workloads?

The memory operates at DDR5 4800 (PC5-38400) with CL40 latency; that rated frequency and timing set the performance boundary under continuous load.

How much power and heat do the two 16 GB sticks produce at 1.1 V all day?

Each module runs at 1.10 V standard DDR5 voltage; total kit capacity is 32 GB, and the unbuffered design keeps power draw and heat within normal DDR5 limits for the NAS chassis.

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