Multiple specs are being released 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
...we've chosen to build something special. The prototype machine is a high-end, high-performance box, built out of off-the-shelf PC parts. It is also fully upgradable, allowing any user to swap out the GPU, hard drive, CPU, even the motherboard if you really want to. Apart from the custom enclosure, anyone can go and build exactly the same machine by shopping for components and assembling it themselves. And we expect that at least a few people will do just that.
It's interesting that Valve have chosen to supply a single standardised unit size, but offer a variety GPUs and CPUs. Will Valve eventually be selling a case/motherboard/PSU/controller combo, and let the user pick and choose their own CPU and GPU? This would be similar to how other small form factor (SFF) PCs are sold, for example, the Shuttle. Or will they eventually offer their own Steam Machine are multiple price points and include every single component?