Back in 2017, DS918+ was the flagship Synology 4-bay NAS and that was replaced with DS920+ in 2020. Also in 2020, the 5-bay DS1520+ got updated.
Synology DiskStation DS920+ is the highest end 4-bay NAS of the new Synology 2020 Plus series. Other models in the series include the DS420+ (4-bay), DS720+ (2-bay), and DS220+ (2-bay).
DS920+ has an Intel Celeron J4125 with 4GB of DDR4 ram. Intel J4125 is a 4-core 2.0 GHz (burstable to 2.7 GHz) processor.
Announced at Computex 2017 in July 2017 and released in October 2017, it is retailing for S$811 in Singapore at Fuwell.
The DS216+ features a dual-core Intel CPU with AES NI hardware encryption engine, Btrfs file system support, and 4K UHD transcoding.