Synology DiskStation DS220+ Upgrade Guide: RAM, Storage and CPU

Lebenszyklus und Support

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RAM: one SO-DIMM slot, 6 GB total

The DS220+ comes with 2 GB of DDR4 non-ECC memory soldered to the board. That memory cannot be removed or replaced. There is one extra slot, a 260-pin DDR4 non-ECC unbuffered SO-DIMM, which sits on the inner right side of the chassis behind the drive trays. Synology's own module is the D4NESO-2666-4G, a 4 GB DDR4-2666 stick, giving you 2 + 4 = 6 GB in total.

Kauftipps

• A single 4 GB DDR4 SO-DIMM is the sensible purchase - it takes the machine to the validated 6 GB ceiling
• DDR4 non-ECC unbuffered only; ECC and registered memory are not supported
• Buying faster memory gains you nothing: modules run at the maximum frequency the CPU supports, not their rated speed
• If keeping full warranty and support matters to you, use Synology's D4NESO-2666-4G

Storage: two SATA bays, no cache, no expansion unit

Both bays take Type D7 trays and accept 3.5-inch SATA HDDs, 2.5-inch SATA HDDs or 2.5-inch SATA SSDs, and both are hot-swappable. No thickness limit for 2.5-inch drives is documented in Synology's spec sheet or installation guide. Two things the DS220+ does not have, unlike the bigger models in the range: there is no M.2 slot, so you cannot add an SSD cache, and there is no eSATA port, so a DX517 expansion unit will not work. Plan your capacity around the two bays.

Kauftipps

• For a faster NAS, 2.5-inch SATA SSDs drop straight into the trays; for capacity, use the largest supported HDDs
• Check Synology's online compatibility list before buying drives - actual support follows that list, not the box specs
• Synology's HAT5300, HAT3300 and SAT5210 drives are the vendor-blessed options
• Capacity figures disagree: the 2020 launch documentation quotes 32 TB raw (2 x 16 TB HDDs), while the spec sheet lists a 108 TB maximum single volume - treat 32 TB as the launch-era figure and the compatibility list as the real-world guide

So rüstest du auf

Bevor du startest

• Back up your data first. An upgrade is the moment a drive or a volume is most at risk.
• Power off the NAS properly through DSM and unplug the power cable and network lead before opening anything. The memory module is not hot-serviceable, even though the drives are.
• Ground yourself - discharge static on a metal surface and handle parts by their edges rather than the chips or connectors.
• Open the case as described in Synology's Hardware Installation Guide for the DS220+. That guide covers the exact disassembly; follow it rather than guessing. For memory, you need to remove the drive trays to reach the slot on the inner right side.
• Install the part: seat the SO-DIMM firmly at an angle and press it flat until the side latches click, or slide a drive into its Type D7 tray and refit the tray.
• Close the case and reconnect the power.
• Start the NAS and check that the firmware reports the new part: DSM's Resource Monitor shows memory, and Storage Manager should list the new drives with their full capacity. If a drive or module is missing, power down and reseat it.

Schritte

1. Back up
   Copy anything irreplaceable off the NAS and verify the copy. A memory or drive change can go wrong, and the fix is usually a restore.
2. Power down and unplug
   Shut the NAS down from DSM, then disconnect the power and network cables. Wait a moment before touching the internals.
3. Ground yourself and open up
   Discharge static, then open the chassis using the Hardware Installation Guide. To reach the RAM slot you must pull the drive trays out first; hold the module by its edges.
4. Install the part
   Fit the SO-DIMM in the slot or mount a drive in a Type D7 tray and insert the tray. Don't force anything - if it resists, recheck the orientation.
5. Close up and check
   Reassemble, power on, and confirm the firmware sees the upgrade in DSM. Then run any planned drive or volume setup through Storage Manager.

Gut zu wissen

• The DS220+ is limited to two bays. If you expect to outgrow it, drive size - not expansion hardware - is the only lever you have.
• Memory capacity figures from third-party vendors are not validated by Synology and may be wrong.

Häufig gestellte Fragen

How much RAM can the Synology DiskStation DS220+ take?

6 GB in total: 2 GB is soldered to the board and cannot be changed, and the single SO-DIMM slot accepts a 4 GB module. That is Synology's validated maximum. Kingston's page claims configurations up to 8 GB and community reports suggest larger modules may sometimes boot, but those are unofficial and the Kingston figures are internally inconsistent - its page also misstates the soldered base memory. We would stick with 6 GB.

Does the DS220+ support an M.2 NVMe SSD cache?

No. There is no M.2 slot of any kind in the DS220+, so SSD caching is not available. Only the larger models in the range, such as the DS720+ and DS920+, have dedicated cache slots.

Can I upgrade the CPU?

No. The Intel Celeron J4025 is soldered to the mainboard (BGA, no socket). There is no supported upgrade path, and the shipped processor is the only one this model will ever run.

Does the DS220+ support ECC memory?

No. It requires DDR4 non-ECC unbuffered memory. There is no ECC option for this platform.

Can I connect a DX517 expansion unit for more drive bays?

No. The DS220+ has no eSATA expansion port - only two USB 3.0 ports - so expansion units are not supported. Capacity has to come from the two internal bays.

Will third-party RAM void my warranty?

Synology states it may not provide complete warranty or technical support if non-Synology memory is used. Third-party DDR4 SO-DIMMs generally work fine, but if full support matters to you, use Synology's D4NESO-2666-4G module.

Offizielle Dokumente und Referenzen

• PDF Synology DiskStation DS220+ Product Specifications (PDF)
  Memory slots and maximum, hot-swap bays, volume limits, RAID support
• PDF Synology DS220+ Hardware Installation Guide (PDF)
  Memory installation location and module, drive tray types, launch capacity figure, warranty note on non-Synology RAM
• PDF Synology DS220+ Data Sheet (PDF)
  Overview of hardware specifications
• Synology DS220+ product page (synology.com)
  Processor details and memory policy
• Synology Plus series launch announcement (synology.com)
  6 GB maximum memory, no M.2 cache slots, no expansion unit support
• Kingston memory page for the DS220 (kingston.com)
  Third-party memory options; note that its capacity figures disagree with Synology's and are internally inconsistent