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Green bare circuit board with gold edge contacts and black memory chips

OWC

OWC 8GB DDR4 2400 CL17 1Rx8 288-pin 1.2V Non-ECC UDIMM QNAP Upgrade

SKU CH-BB4N-A6SZ0

An 8 GB DDR4-2400 CL17 UDIMM module built for QNAP TS-1273U-RP, TS-1277, TS-1635AX, TS-1673U and TS-1673U-RP NAS systems

  • Capacity8GB
  • Type288-Pin DDR4 Non-ECC UDIMM
  • SpeedDDR4 2400 (PC4 19200)
  • CAS LatencyCL17
  • Voltage1.2V
  • ECCNo
  • 8GB capacity expands NAS multitasking headroom
  • DDR4 2400 CL17 speed matches QNAP specs
  • 2V low voltage reduces system power draw
  • JEDEC and ROHS compliant for warranty-safe upgrades
  • Backward compatible with 2133MHz systems

Single-module QNAP upgrade

This OWC 8GB DDR4 module is built for QNAP TS-1273U-RP, TS-1277, TS-1635AX, TS-1673U and TS-1673U-RP NAS units. It replaces QNAP part numbers RAM-8GDR4A0-UD-2400 and RAM-8GDR4A1-UD-2400. The unbuffered UDIMM installs in a standard 288-pin slot. Buyers needing ECC protection or registered DIMMs cannot use this module.

DDR4 2400 speed ceiling

The memory runs at 2400 MT/s with CL17 latency at 1.2V. It is backward compatible with 2133 MT/s systems but will not exceed the 2400 MT/s data rate. Builders targeting higher frequencies or lower latencies must choose a different specification. The JEDEC-standard PC4-19200 rating defines the maximum bandwidth this module can deliver.

8GB capacity limit

A single 1Rx8 rank provides eight gigabytes of non-ECC storage. Systems requiring more total memory need additional slots and compatible modules. The lack of a heat spreader keeps the profile low for dense NAS chassis. This capacity suits moderate workloads but not memory-intensive virtualization or large database caching.

Highlights

  • 8GB capacity expands NAS multitasking headroom
  • DDR4 2400 CL17 speed matches QNAP specs
  • 2V low voltage reduces system power draw
  • JEDEC and ROHS compliant for warranty-safe upgrades
  • Backward compatible with 2133MHz systems

Specifications

BrandOWC
Part Number2U4D41R808GB
Capacity8GB
Type288-Pin DDR4 Non-ECC UDIMM
SpeedDDR4 2400 (PC4 19200)
CAS LatencyCL17
Voltage1.2V
ECCNo
Buffered/RegisteredUnbuffered
Rank1Rx8
Heat SpreaderNo
Compatible SystemQNAP TS-1273U-RP
QNAP TS-1277
QNAP TS-1635AX
QNAP TS-1673U
QNAP TS-1673U-RP

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Questions about this item

Should I choose the single 8GB module or a larger kit for my QNAP TS-1673U?

This listing is a single 8GB DDR4 2400 CL17 1Rx8 UDIMM. If your NAS has empty slots you can add one module; for maximum bandwidth populate all channels with identical modules.

What does the 2400MHz speed rating deliver inside a TS-1277?

The module runs at DDR4 2400 (PC4-19200) with CL17 latency at 1.2V. The NAS memory controller will operate it at its supported rate, which may be 2400MHz or the lower 2133MHz JEDEC speed.

Does the 288-pin DDR4 interface limit capacity or speed on a TS-1635AX?

The 288-pin unbuffered non-ECC DDR4 form factor fits the supported slots. Speed is capped by the platform's memory controller at 2400MHz or 2133MHz; capacity per slot is defined by the NAS specifications.

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