We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
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

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • 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.

How it compares

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

Price $428.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 64 GB (2 × 32 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $6.70 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 number2C6D42R8064P
Total capacity64 GB (2 × 32 GB)
Product type260-Pin DDR4 ECC SODIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology 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.

More in Model-Specific Memory Upgrades

Similar items