Steam Machines and Steam OS will be open to all: Newell

[Glordit]

And so far the PS4 is the only system to use it. Strangely enough the Xbox One opted to stick with DDR3.

I think because the PS4 is mostly a APU, Sony found a way to get GDDR5 to work as RAM and as VRAM with their own unique memory controller. I would really like to know how they managed to get it done. The PS4 manages a impressive 176 GB/s on the memory bandwidth front.