This may be the most expensive 'free' computer you've ever seen

You can have an open-source operating system on your PC, but it’ll never be truly “free” because all modern x86-based CPUs and chipsets feature secret firmware “blobs” that are proprietary to AMD and Intel.
That’s something Raptor Engineering is hoping to address with what may be the world’s first modern ATX motherboard using a Power8 CPU (a product of IBM’s open-source OpenPower group).
Dubbed the Talos Secure Workstation, Raptor Engineering