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Four green DDR5 UDIMM sticks, no heat spreaders, 288-pin, 128GB kit

NEMIX RAM

NEMIX RAM 128GB (4x32GB) DDR5 4800 CL40 ECC UDIMM memory upgrade

SKU CH-MCB8-J5G50

128 GB DDR5 ECC UDIMM kit runs at 4800 MHz with CL40 latency for QNAP TS-H1677AXU-RP NAS

  • Capacity128GB (4 x 32GB)
  • SpeedDDR5 4800 (PC5 38400)
  • ECCYes
  • Buffered/RegisteredUnbuffered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.10V

Capacity 128GB 4X32GB

  • 128 GB total capacity across four 32 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC unbuffered design detects and corrects single-bit errors
  • Low 1.10 V operation reduces power draw and heat
  • Validated for QNAP TS-H1677AXU-RP NAS compatibility

QNAP NAS DDR5 ECC upgrade kit

This 128GB kit contains four 32GB DDR5 4800 CL40 ECC UDIMM modules built for the QNAP TS-H1677AXU-RP NAS. Each stick runs at 1.1V with a 2Rx8 organisation and uses 288-pin unbuffered connectors. The kit targets administrators who need maximum supported capacity for virtualisation or heavy file workloads.

DDR5 4800 interface constraints

The modules operate at the JEDEC base speed of 4800 MT/s with CL40 latency and 1.1V voltage. ECC protection is provided through the unbuffered UDIMM topology, which the NAS memory controller must support natively. No heat spreaders are fitted, so airflow across the DIMM slots must be adequate for sustained loads. Systems limited to lower DDR5 speeds or registered DIMMs will not accept this kit.

CL40 latency at 4800 MT/s

CAS latency of 40 cycles at 4800 MT/s determines the baseline access delay for every read and write operation. Builders comparing qualified memory lists should match this timing exactly; modules with different latencies may not train correctly on the target NAS platform.

Highlights

  • 128 GB total capacity across four 32 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC unbuffered design detects and corrects single-bit errors
  • Low 1.10 V operation reduces power draw and heat
  • Validated for QNAP TS-H1677AXU-RP NAS compatibility

Specifications

BrandNEMIX RAM
SeriesQNAP NAS Compatible Series Memory
ModelQNAP DDR5 4800MHZ ECC Unbuffered UDIMM NAS Memory
Part NumberME38400-328K4
Capacity128GB (4 x 32GB)
SpeedDDR5 4800 (PC5 38400)
ECCYes
Buffered/RegisteredUnbuffered
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.10V
Compatible SystemQnap
CAS LatencyCL40
Heat SpreaderNo
Type288-Pin DDR5 ECC UDIMM
Rank2Rx8
FeaturesDDR5 ECC Unbuffered UDIMM Motherboard Compatible
Package Content128GB (4X32GB) DDR5 4800MHZ PC5-38400 2Rx8 1.1V CL40 288-PIN ECC Unbuffered UDIMM KIT

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Questions about this item

Should I choose the 128GB kit or a smaller capacity for my QNAP TS-H1677AXU-RP?

The 128GB kit uses four 32GB modules to fill four slots. Select it when the NAS needs the maximum supported memory for heavy workloads.

What does the DDR5 4800 speed deliver inside the TS-H1677AXU-RP?

The modules run at 4800 MT/s with CL40 latency, providing the bandwidth the NAS CPU expects for data-intensive tasks.

How does the 288-pin DDR5 ECC UDIMM interface affect compatibility?

The 288-pin DDR5 ECC UDIMM form factor matches the TS-H1677AXU-RP memory slots exactly, ensuring correct electrical and mechanical fit.

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