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Green circuit board with black memory chips and gold edge connectors

OWC

OWC 8GB DDR4 2666MHz ECC UDIMM CL19 1.2V 1Rx8 Synology RS2421+ RS2421RP+

SKU CH-8N5T-PES6N

8GB DDR4 2666MHz ECC UDIMM adds error-correcting memory to Synology RS2421+ and RS2421RP+ NAS units

  • Capacity8GB
  • Type288-Pin DDR4 ECC UDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes

Capacity 8GB

  • ECC protection prevents data errors in Synology RS2421+ and RS2421RP+
  • 2666 MHz DDR4 speed boosts NAS responsiveness for multitasking workloads
  • 2 V low-voltage operation reduces power draw and heat
  • Single 8 GB 1Rx8 module installs easily in 288-pin UDIMM slots
  • JEDEC and RoHS compliant for warranty-safe, standards-based upgrades

Synology RS2421+/RP+ ECC Memory Upgrade

This 8GB DDR4 ECC UDIMM is validated for the Synology RackStation RS2421+ and RS2421RP+. It adds capacity to NAS workloads that require error-correcting memory for data integrity. The single module installs in a standard 288-pin slot. It is not suited for systems that need registered DIMMs or non-ECC memory.

JEDEC-Standard 1.2V Operation

The module runs at the JEDEC 1.2V specification with a CL19 latency at 2666MHz. Standard voltage keeps power draw low and thermals manageable inside a populated rack chassis. No heat spreader is fitted, so airflow from the system fans cools the DRAM directly. Acoustic profile is unchanged because the DIMM adds no moving parts.

288-Pin UDIMM Form Factor

The stick fits any DDR4 UDIMM slot wired for ECC unbuffered operation. Backward compatibility with 2133MHz and 2400MHz buses lets it slot into mixed-speed configurations without manual tuning. It frees a second slot for future expansion while delivering 8GB per module. Builds requiring registered memory or higher densities must use different modules.

Helstu kostir

  • ECC protection prevents data errors in Synology RS2421+ and RS2421RP+
  • 2666 MHz DDR4 speed boosts NAS responsiveness for multitasking workloads
  • 2 V low-voltage operation reduces power draw and heat
  • Single 8 GB 1Rx8 module installs easily in 288-pin UDIMM slots
  • JEDEC and RoHS compliant for warranty-safe, standards-based upgrades

Tæknilýsing

BrandOWC
Part Number2E6D41R808GB
Capacity8GB
Type288-Pin DDR4 ECC UDIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredUnbuffered
Rank1Rx8
Heat SpreaderNo
Compatible SystemSynology RackstationRS2421+
Synology RackstationRS2421RP+

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How is the 288-pin DDR4 UDIMM installed in the Synology RS2421+ and what step is often missed?

Power off the NAS, open the chassis, align the notch on the 288-pin DDR4 UDIMM with the slot key, press firmly until both retention clips click, then confirm the module is recognised in DSM before closing the case.

What maintenance or replacement will the ECC UDIMM need over its service life?

The module has no moving parts and requires no scheduled maintenance; replacement is only needed if a memory error appears in DSM logs or a capacity increase is desired.

What limit appears first when the RS2421RP+ runs sustained workloads with this 2666MHz CL19 kit?

The memory controller caps operation at 2666MHz CL19, so bandwidth and latency remain fixed regardless of load duration.

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