Earlier last week Valve has announce the full list of parnter which will make the Steam Machines system and although Maingear was on the list with a rather large, full sized computer, it appears that the company will have a smaller one as well based on AMD hardware.
While most of the smaller Steam Machine version focus on one or the other Intel Haswell CPU, Maingear decided to use AMD's A8-5557M APU with Radeon R9 M275X 2GB GPU. In case you missed it earlier, the A8-5557M is a quad-core APU working at 2.1GHz base and 3.1GHz maximum Turbo clock and has a 35W TDP. Unfortunately, there are still no details regarding the R9 M275X GPU part but it most likely is a re-badged 8000M-series part which should perform similar to the Radeon HD 7750, according to early details.
According to TechReport.com, Maingear plans to sell the small Steam Machine for under US $1,000 and while Windows-based version should be released soon, the SteamOS based one is scheduled for June and will ship with Valve's Steam Controller bundled with it.
Source:
TechReport.com.