When Mini-box.com says their picoPSU-120 PC power supply is the world’s smallest, they do mean it. Measuring only 31 x 45 x 20mm, the PSU is merely the size of two AA batteries. It plugs directly into the computer mainboard’s ATX 12-volt connector and is fanless, making it 100% silent. It also provides connectors to power the typical 1 hard drive, 1 optical drive and 1 floppy drive setup.

The picoPSU provides 120 watts of power, and will power up to a 3-GHz Pentium 4 processor, although it really is meant for low-power processors such as the new VIA Eden processor family.

The picoPSU is available from Mini-box.com at $49.95.