Valve is giving us a peek at what 300 lucky individuals will get their hands on during the Steam hardware beta. They're going for a balance of power, quietness, and not looking like a behemoth under your TV. The beta machines give a range of quality in CPU and GPU, but look at the RAM/Hard Drive space. That's quite nice. No pictures of the beta hardware yet, but they will share that soon.

Without further ado, the specs:

The 300 prototype units will ship with the following components:
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 GDDR5 (GPU)
Storage: 1TB/8GB Hybrid SSHD
Power Supply: Internal 450w 80Plus Gold
Dimensions: approx. 12 x 12.4 x 2.9 in high

Valve has also promised to provide the enclosure specs as a CAD file for people to tweak and 3D-print to their heart's content.

Check out the full post here: http://steamcommunity.com/groups/steamuniverse#announcements/detail/2145128928746175450