The first iBuyPower Steam Machine is expected to be powered by an AMD processor and is said to have a Radeon R9 270 graphics card. It's nice to see it's not a problematic R9 290 GPU and the R9 270X works well under Linux when using the Catalyst driver. The iBuyPower device will surely be using the binary blob for better OpenGL support and performance with the RadeonSI Gallium3D driver being only half-baked for GCN hardware.
The AMD-powered iBuyPower Steam Machines device is expected to come in just shy of $500 USD. A couple more details on this iBuyPower system can be found courtesy of The Verge. More details on different Steam Machines should be revealed in January during CES.