While Steam Machines will be manufactured by different companies with different specs, Valve is producing something special for their own prototype. The machine is a high-end unit built from off-the-shelf PC components. It’s fully upgradeable, allowing the GPU, CPU, HDD and even the motherboard to be swapped out. In fact, besides the custom enclosure, anybody can assemble the same machine themselves.
Here are the specs for 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
As you can see, it’s a fairly hardcore (and small) system, with some units even including the NVidia Titan. Of course, the machine was not designed with the needs of the average Steam user in mind, but instead intended for those who demand top performance from their setup. No pictures have been posted because the units are simply not finished enough, but shots will be released before they ship.
Head over here for more details.