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Green printed circuit board with black memory chips and gold edge connectors

OWC

OWC 8GB DDR4 2400 CL17 1Rx8 288-pin UDIMM for QNAP TS-873U TS-873U-RP TS-877

SKU CH-HCZB-CKN0W

8GB DDR4 2400 CL17 UDIMM module validated for QNAP TS-873U, TS-873U-RP and TS-877 NAS systems

  • Total capacity8 GB
  • Rated speedDDR4 2400 (PC4 19200)
  • CAS latencyCL17
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank1Rx8
  • 8GB capacity expands NAS multitasking headroom for heavier workloads
  • DDR4 2400 speed with CL17 latency keeps data flowing smoothly
  • 2V low-voltage operation reduces power draw and heat
  • JEDEC-standard compliant module ensures warranty-safe QNAP upgrades
  • Backward compatible with 2133MHz systems for flexible deployment

8GB DDR4 2400 Module for QNAP NAS

This OWC module provides 8GB of DDR4 2400 memory in a 288-pin UDIMM form factor. It operates at 1.2V with CL17 latency and a 1Rx8 rank configuration. The non-ECC unbuffered design matches the specifications for QNAP TS-873U, TS-873U-RP and TS-877 systems. JEDEC compliance ensures a warranty-safe upgrade path.

Suits QNAP NAS upgrades needing non-ECC UDIMMs

This module fits owners of the listed QNAP models who want to add 8GB of DDR4 2400 memory using a standard UDIMM slot. It is not for systems that require ECC registered DIMMs or SODIMM form factors. Buyers needing error-correcting code memory should look elsewhere. The single-rank layout works with the validated QNAP platforms.

CL17 latency at DDR4 2400 speed

The CAS latency of CL17 at 2400 MT/s defines the module's timing profile for the compatible QNAP NAS units. Backward compatibility with 2133 MHz operation is supported. This timing specification determines whether the module matches the system's memory controller requirements. No heat spreader is included on the PCB.

How it compares

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

Price $46.99
Cheaper than about 78% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB
Lower than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $5.87 per GB
Cheaper than about 67% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2U4D41R808 GB
Total capacity8 GB
Product type288-Pin DDR4 Non-ECC UDIMM
Performance
Rated speedDDR4 2400 (PC4 19200)
Memory
CAS latencyCL17
ECC supportNo
Buffer typeUnbuffered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsQNAP TS-873U
QNAP TS-873U-RP
QNAP TS-877

Other versions of this model

5 more in the same range

Questions about this item

How much heat and power does the 1.2 V DDR4 2400 module draw when the NAS runs continuously?

The module operates at the standard DDR4 voltage of 1.2 V with no heat spreader, so thermal output stays low during all-day workloads.

What must the QNAP TS-873U already have for this 288-pin UDIMM to install and function?

An available 288-pin DDR4 UDIMM slot and a BIOS that accepts non-ECC unbuffered memory at CL17 timing.

Will this CL17 stick run stably alongside existing 2133 MHz modules in a TS-877?

Yes, the spec lists backward compatibility with 2133 MHz, so the faster module will down-clock to match the slower ones.

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