MinnowBoard uses a 5V/2.5A power supply. Other specs are as follows:
Intel Atom E640 CPU (1.0GHz, 32-bit with Hyper-threading and Virtualization Technology)
Integrated Intel Graphics Media Accelerator (GMA) 600
1GB DDR2 RAM
8 GPIO pins
2 GPIO-controlled LEDs
4 GPIO switches
via $199, 4.2” computer is Intel’s first Raspberry Pi competitor | Ars Technica.