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Green rectangular DDR4 memory module with gold contacts and black chips, no heat spreader

OWC

OWC 8GB DDR4 2666MHz ECC UDIMM memory upgrade

SKU CH-WGKK-3MKB8

8GB DDR4 2666MHz ECC unbuffered UDIMM for Synology RackStation RS3617RPxs and RS3617xs+ NAS systems

  • Total capacity8 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank1Rx8

Capacity 8GB

  • ECC protection guards data integrity in Synology RS3617RPxs and RS3617xs+
  • 2666 MHz DDR4 speed raises bandwidth for demanding NAS workloads
  • Low 1.2 V operation reduces heat and power draw in rack systems
  • 100 % JEDEC and RoHS compliance keeps warranty intact
  • Single 8 GB unbuffered DIMM installs quickly without tools

8GB DDR4 ECC UDIMM for Synology RackStation

This single 8GB DDR4 2666MHz module targets owners of Synology RackStation RS3617RPxs and RS3617xs+ units who need an ECC unbuffered upgrade. It delivers 1Rx8 organisation at CL19 latency and 1.2V operation.

Check slot count and current population

Verify how many 288-pin UDIMM slots your RackStation has free and whether existing modules are also DDR4 2666 ECC unbuffered. The system will clock down to 2133MHz or 2400MHz if slower sticks are present, so matching speed avoids mixed-speed operation.

Fits standard DDR4 UDIMM slots without spreader

The low-profile stick sits in any 288-pin DDR4 slot and leaves adjacent bays clear for additional modules. JEDEC and RoHS compliance keeps the upgrade warranty-safe while the ECC function protects data integrity in NAS workloads.

How it compares

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

Price $53.99
Cheaper than about 77% 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 $6.75 per GB
Cheaper than about 59% 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 nameOWC
Part number2E6D41R808 GB
Total capacity8 GB
Product type288-Pin DDR4 ECC UDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology RackstationRS3617RPxs
Synology RackstationRS3617xs+

Other versions of this model

5 more in the same range

Questions about this item

Does the OWC 8GB DDR4 2666MHz ECC UDIMM come as a single stick or a kit, and is anything else needed for installation?

The upgrade consists of one 8GB 288-pin DDR4 ECC unbuffered DIMM rated at 2666MHz CL19 1.2V. No extra parts are required; the module fits directly into the compatible Synology RackStation slots.

Should I choose the 8GB module or look for a different capacity for my RS3617RPxs or RS3617xs+?

This part number 2E6D41R808GB provides a single 8GB rank 1Rx8 module. Add one or more of these sticks to reach the total memory your NAS configuration requires.

What does the 2666MHz rating actually deliver when the module runs in a Synology RackStation?

The module operates at DDR4 2666 PC4-21300 CL19 1.2V and is backward compatible with 2400MHz and 2133MHz systems, so it will run at the highest speed the RackStation memory controller supports.

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