I’m using Intel i5 NUC 64GB SSD, 4GB RAM. Music storage from NAS. Both NUC and NAS are powered by a linear power supply. It is connected via USB to the Holo Spring R2R DAC. My amps are VTL 2.5i pre and monoblocks VTL-MB125 driving Dynaudio Contour 1.8Mk2 speakers.
Both Rock and Windows 10 with Roon are tested on the same hardware, just swapping the SSD with different OS. My opinion is Rock has probably the least threads and TSR running on the backgrounds, thus this creates less ‘noise’ compared to Windows based OS. Rock+Roon is more of ‘dedicated’ audio playback.