Steam Machines: Valve’s 300 prototypes



GPU: some units with NVidia Titan, some GTX780, some GTX760, and some GTX660 
CPU: some boxes with Intel : i7-4770, some i5-4570, and some i3 
RAM: 16GB DDR3-1600 (CPU), 3GB DDR5 (GPU) 
Storage: 1TB/8GB Hybrid SSHD 
Power Supply: Internal 450w 80Plus Gold 
Dimensions: approx. 12 x 12.4 x 2.9 in high.

Fuente: Valve