Ubuntu Server certified hardware
Canonical works closely with OEMs to certify Ubuntu on a range of their hardware.
The following are all certified. More and more devices are being added with each release, so don't forget to check this page regularly.
Cavium, Inc. Cavium ThunderX CRB, ver 2.0 , Dual Socket Server
Cavium, Inc. Cavium ThunderX CRB, ver 2.0 , Single socket Server
Cavium, Inc. Thunder X2 System CN99XX