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Two green DDR4 SODIMM sticks, 260-pin, no heat spreader

OWC

OWC 64GB (2x32GB) DDR4 2666 ECC SODIMM for DS723+ DS923+

SKU CH-TWXM-DX61Y

A 64 GB DDR4 2666 ECC SODIMM kit for Synology DS723+ and DS923+ NAS units

  • Capacity64GB (2 x 32GB)
  • Type260-Pin DDR4 ECC SODIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes
  • 64 GB dual-channel kit expands NAS multitasking headroom
  • ECC protection guards data integrity in DS723+ and DS923+
  • 2666 MHz DDR4 speed with CL19 latency accelerates file operations
  • 2 V low-voltage modules reduce power draw and heat
  • Backward compatible with 2400 MHz and 2133 MHz systems

Capacity and Compatibility

This kit provides 64GB of DDR4 ECC memory in two 32GB SODIMM modules. It is built specifically for Synology DiskStation DS723+ and DS923+ NAS units. The modules run at 2666MHz with CL19 latency and 1.2V operation. Buyers who need a higher capacity than 64GB or a different form factor cannot use this kit.

JEDEC Compliance and Backward Compatibility

The memory meets JEDEC and RoHS standards for a warranty-safe upgrade. It is backward compatible with 2400MHz and 2133MHz systems, allowing installation in platforms that run at those lower speeds. The kit includes no extra software, heat spreaders or cables; the value is in the validated compatibility and ECC error correction.

Build and Daily Use

Each module uses a 260-pin unbuffered 2Rx8 layout without a heat spreader, keeping the profile low for tight NAS bays. The SODIMM form factor slots directly into the DiskStation memory sockets for a straightforward DIY installation. ECC support helps maintain data integrity during continuous operation.

Highlights

  • 64 GB dual-channel kit expands NAS multitasking headroom
  • ECC protection guards data integrity in DS723+ and DS923+
  • 2666 MHz DDR4 speed with CL19 latency accelerates file operations
  • 2 V low-voltage modules reduce power draw and heat
  • Backward compatible with 2400 MHz and 2133 MHz systems

Specifications

BrandOWC
Part Number2C6D42R8064P
Capacity64GB (2 x 32GB)
Type260-Pin DDR4 ECC SODIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredUnbuffered
Rank2Rx8
Heat SpreaderNo
Compatible SystemSynology DiskStation DS723+
Synology DiskStation DS923+

Questions about this item

Will these 32GB DDR4 2666 ECC SODIMM modules need any firmware updates or reconfiguration after installation in a DS723+?

No firmware updates are required; the modules are JEDEC-standard 1.2V DDR4 2666 CL19 and the Synology NAS detects them automatically on boot.

What thermal limit appears first when the DS923+ runs these 2Rx8 ECC modules at full load continuously?

The modules have no heat spreader, so the DRAM junction temperature reaches its JEDEC-rated maximum before the NAS chassis hits its thermal throttle point.

How much extra power do the two 32GB DDR4 2666 ECC SODIMMs draw compared with the stock 8GB kit in a DS723+?

Each module runs at 1.2V DDR4 standard voltage; total kit draw rises by only a few watts over the factory 8GB configuration.

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