SSDs can only be used for caching Synology’s DiskStation DS1621xs+ targets businesses and remote workers that want plenty of NAS power in a compact desktop form factor. This 6-bay appliance is Synology’s first Intel-powered model to sport an embedded 10GBase-T port and it sweetens the deal further with dual M.2 NVMe SSD slots, support for fast DDR4 memory and a spare PCI-E expansion slot. Costing £1,352 for a diskless model, the DS1621xs+ is a little on the expensive side for a 6-bay NAS, but on the other hand, you’re getting plenty of power for your money. It has a decent 2.2GHz quad-core Intel Xeon D-1527 CPU in the driving seat, partnered by 8GB of DDR4 memory upgradeable to a maximum of 32GB.