Those Via boards don't actually need the full 120W, unless one fully tricks them out with the max number of USB2 devices, each drawing the max 0.5A@5VDC, etc..

My server here has a notebook drive, some LEDs, an extra ethernet PCI card, and not much else. The PSU is rated for 60W, but the whole danged thing only draws about 18-25W, depending on CPU activity.

Cheers