This 12v power supply works with all Dreamcast versions from all regions (PAL, NTSC-US, NTSC-J).
The PSU includes a couple of extra sockets (5v and 12v) for extra mods (connectors are JST VH).
This has been tested with both original GD-Rom drive and ODEs (GDEMU, Fenrir, and MODE).
Please note that this design follows PCB layout best practice and that the choice of components is tailored to the specific needs of the Dreamcast. All components are good quality branded ones. When tested with a good-quality 12v adapter, this PSU offered a ripple+noise output of around 30mV on the 3.3v and 5v rails under load.