The QNAP TS-h886 ships with 8 GB of RAM and can take up to 64 GB

The TS-h886 comes with one 8 GB DDR4 module pre-installed, but there are two SO-DIMM slots underneath, both running at DDR4-2666. Populating both gets you up to 64 GB — enough headroom for a decent-sized container stack or several VMs on this NAS.