Synology DiskStation DS220j

Synology DiskStation DS223j vs. DS220j

Synology launched the DiskStation DS223j in 2023 with a new ARM processor, more DDR4 RAM for DiskStation Manager to utilize, and support for Btrfs. The NAS replaces the popular and affordable DS220j. This guide will run you through everything you’d need to know when comparing the Synology DiskStation DS223j vs. DS220j.

Synology DiskStation DS223j

Newer and better NAS

Synology DiskStation DS223j
Synology DiskStation DS223j. (Source: Synology)
  • Faster ARM processor
  • More RAM
  • Two drive bays
  • The same excellent DSM OS
  • No M.2 slot?

The Synology DiskStation DS223j is the newer NAS of the two, offering a more capable ARM processor, double the RAM capacity at 1GB, lower power draw, and support for Btrfs. It’s simply better in almost every way.

Synology DiskStation DS220j

A good choice if on sale

Synology DiskStation DS220j
Synology DiskStation DS220j. (Source: Synology)
  • The same excellent DSM OS
  • Two drive bays
  • Slower ARM processor
  • No Btrfs support
  • Less RAM

The DiskStation DS220j from Synology is the predecessor to the newer DS223j. It’s still a great affordable enclosure if you can find it at a discount, but when priced to match the DS223j, we’d recommend the DS223j every time.

Choosing between the Synology DiskStation DS223j and DS220j is an easy choice. There’s no reason why anyone should choose the older DS220j over the DS223j unless the former is discounted and on sale. But even then we’d contest that the DS223j with its faster CPU and double the amount of system memory is still the better buy.

The newer DS223j has better specs

The DS223j and DS220j have identical specifications aside from the CPU and RAM. Both have two drive bays with a capacity of 40TB (using two 20TB drives). They’re cooled by a single 92mm fan on the rear of the enclosure. The dimensions and weight are also the same for both enclosures.

Synology DiskStation DS223jSynology DiskStation DS220j
CPURealtek RTD1619B
(4-core, 1.7 GHz burst)
Realtek RTD1296
(4-core, 1.4 GHz burst)
RAM1 GB DDR4 (max 1 GB)512 MB DDR4 (max 512 MB)
Drive bays2 (SSD/HDD)2 (SSD/HDD)
Capacity40TB40TB
Expansion support
Cooling1x 92 mm fan1x 92 mm fan
Ports1x 1GbE
2x USB-A 3.2 Gen 1
1x USB-A 2.0
1x 1GbE
2x USB-A 3.2 Gen 1
Power draw~16.31 W~12.46 W
Dimensions165 x 100 x 225.5 mm165 x 100 x 225.5 mm
Weight0.88 kg0.88 kg
Price$190$190

Where the DS223j takes the crown is with the extra USB-A 2.0 port not found on the older DS220j. But more importantly, there’s the new Realtek RTD1619B with its four physical cores and 1.7GHz clock speed. 1GB of DDR4 RAM is included with the DS223j, making it far more responsive and the best NAS out of the two.

A side effect of using the newer ARM processor is a slight increase in the draw of power. This shouldn’t be an issue since the DS223j only draws up to 16 watts with both drives actively reading and writing. However, it’s worth bearing in mind for calculating UPS capacity with other hardware.

Go with the DS220j if it’s heavily discounted

Synology DiskStation DS223j vs. DS220j
Synology DiskStation DS220j. (Source: NAS Master)

There is one instance where the Synology DiskStation DS220j may make sense and that’s if you can locate one at a discount. Being an outgoing NAS, it may be possible to find it priced lower than the DS223j. But even then we may recommend buying the DS223j and enjoy the better CPU and RAM.

It’s not a huge improvement, but it does provide the NAS with considerably more horsepower to run the DiskStation Manager (DSM) OS and all its available apps and services.

Synology DiskStation DS223j

Synology DiskStation DS223j
Synology DiskStation DS223j. (Source: Synology)

We’d recommend buying the DiskStation DS223j over the DS220j in almost all instances unless the latter is available at a discount. It’s the better NAS.

Synology DiskStation DS220j

Synology DiskStation DS220j
Synology DiskStation DS220j. (Source: Synology)

The older Synology DiskStation DS220j is only really worth considering if you find it on sale and don’t require a faster CPU, more RAM, and Btrfs support.

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