I reviewed the DS918+ three years ago, so it is now time to take a look at its successor, the DS920+, which looks the same externally. The main differences between these models are listed below.

The significant differences are in the faster CPU and RAM and the more capable, embedded GPU of the Intel Celeron J4125 SoC used by the DS920+.
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https://www.techpowerup.com/review/synology-ds920-4-bay-nas/