DS1522+ is practically the same as DS923+ with an extra HDD bay (4 bays vs 5 bays). Neither of them have a multimedia chip built-in. The DS920+ is now replaced with the DS923+ and people try to get this model while they still can, thanks to the built-in graphics.
The AMD CPU is faster if you need things like virtual machines and 10Gbe support, or even NVMe pools.
HDD restrictions only apply to XS series models.
The AMD CPU is faster if you need things like virtual machines and 10Gbe support, or even NVMe pools.
HDD restrictions only apply to XS series models.