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Two green DDR4 ECC SODIMM modules, 260-pin, no heat spreader

OWC

OWC 16GB (2x8GB) DDR4 2666 CL19 ECC SODIMM RS820+/RS820RP+ memory upgrade

SKU CH-JKKM-SPHV6

16 GB dual-channel DDR4-2666 ECC SODIMM kit validated for Synology RS820+ and RS820RP+ NAS units

  • Total capacity16 GB (2 × 8 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank1Rx8

Capacity 16GB (2 x 8GB)

  • 16 GB dual-channel kit for Synology RS820+ and RS820RP+
  • DDR4 2666 CL19 ECC for data integrity in NAS workloads
  • 2 V unbuffered SODIMM runs cool without a heat spreader
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • Backward compatible with 2400 and 2133 MHz systems

OWC 16GB DDR4 2666 ECC SODIMM kit

This OWC kit provides 16GB of DDR4 2666 ECC memory as two 8GB SODIMM modules. It is built for Synology Rackstation RS820+ and RS820RP+ units that accept 260-pin unbuffered ECC memory. The modules run at 1.2V with CL19 timing and conform to JEDEC PC4-21300 specifications.

Suits NAS owners adding ECC capacity.

The kit suits administrators who need to expand ECC-protected memory in the listed Rackstation models. It is not for laptops or desktops that require non-ECC SODIMMs, nor for platforms that only support registered or load-reduced DIMMs. Buyers whose systems lack ECC support in the chipset or BIOS should look elsewhere.

260-pin DDR4 ECC SODIMM at 2666 MT/s CL19

The decisive specification is the 260-pin DDR4 ECC SODIMM form factor operating at 2666 MT/s with CL19 latency. This matches the memory controller and slot keying of the RS820+ and RS820RP+. Modules with a different pin count, voltage, or ECC type will not install or function correctly in these NAS units.

How it compares

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

Price $112.99
Cheaper than about 66% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB (2 × 8 GB)
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $7.06 per GB
Cheaper than about 57% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2C6D41R8016P
Total capacity16 GB (2 × 8 GB)
Product type260-Pin DDR4 ECC SODIMM
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 RackstationRS820+
Synology RackstationRS820RP+

Other versions of this model

5 more in the same range

Questions about this item

Does the DDR4 2666 interface run at 2666 MHz in the Synology RS820+ or RS820RP+?

The modules are rated for DDR4 2666 (PC4-21300) and are backward compatible with 2400 MHz and 2133 MHz, so the actual speed depends on what the NAS memory controller supports.

What physical slot and form factor do these modules need to fit the RS820+ or RS820RP+?

They are 260-pin DDR4 ECC SODIMMs, the standard SO-DIMM form factor used in those Synology RackStation models.

How are the two 8 GB sticks installed in the RS820+ or RS820RP+, and what step do people often miss?

Power off the NAS, open the chassis, insert each SODIMM at an angle into the memory slots until the side clips click, then reassemble; the step often missed is fully seating both modules so the clips lock on both sides.

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