We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Four green circuit boards with black chips in static bags

NEMIX RAM

NEMIX RAM 64GB (4x16GB) DDR5 4800 CL40 1.1V 288-pin UDIMM QNAP TS-H1677AXU-RP memory upgrade

SKU CH-6V9J-1G1A8

A 64 GB DDR5 kit of four 16 GB modules at 4800 MT/s, CL40, 1.1 V, validated for the QNAP TS-H1677AXU-RP NAS

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeUnbuffered
  • Rated voltage1.1 V

Capacity 64GB 4X16GB

  • 64 GB total capacity with four 16 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • Low 1.1 V operating voltage for efficient power use
  • CL40 CAS latency tuned for responsive access
  • 288-pin UDIMM form factor fits QNAP TS-H1677AXU-RP NAS

QNAP TS-H1677AXU-RP memory kit

This 64 GB kit contains four 16 GB DDR5 modules validated for the QNAP TS-H1677AXU-RP NAS. It targets administrators who need to expand system memory for virtualization or heavy multi-user workloads.

DDR5 4800 CL40 1.1 V unbuffered non-ECC

The decisive specification is DDR5 4800 with CL40 latency at 1.1 V in a 288-pin UDIMM form factor. The kit is unbuffered and non-ECC, so it matches only platforms that accept that exact combination.

Tool-less slot installation

Modules insert vertically into the NAS memory slots without tools; the process normally takes a few minutes. The common issue is mixing these sticks with existing memory of a different speed or rank, which can prevent the system from posting.

How it compares

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

Price $732.99
Pricier than about 57% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (4 × 16 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $11.45 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 numberMD38400-618K4
Total capacity64 GB (4 × 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 items64 GB (4 × 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

What does the 4800 MT/s speed mean when installed in the TS-H1677AXU-RP?

The modules run at DDR5 4800 (PC5-38400) with CL40 latency, delivering the rated throughput provided the NAS memory controller supports that speed.

How does the DDR5 UDIMM interface affect usable bandwidth in this NAS?

As unbuffered non-ECC DDR5 UDIMMs, they connect directly to the CPU memory channels without a register, so maximum bandwidth is limited by the TS-H1677AXU-RP's own memory controller.

What physical slots and clearance does the 288-pin UDIMM kit require?

The kit contains four 16 GB 288-pin DDR5 UDIMMs that need four standard UDIMM slots; no heat spreader is fitted, so low-profile clearance is sufficient.

More in Model-Specific Memory Upgrades

Similar items