Why not buy
A10-5700 APU £90 (with Directx 11 for up-to-date games/run blu ray etc)
it idles at 27watts and is equivalent/more powerful than an FX8120 in many benchmarks
a decent asus FM2 m/board m-atx A75/A85 £50-£100
Tweak your memory up to 1866 speed to help shared graphics (cos up to 2gb gets reserved from total memory)
This is a good local UK search engine esp as FM2 motherboards are still in short supply in Europe (sellers are taking price advantage) Choose your own prefered maker etc for a new search
http://www.staticice.co.uk/cgi-bin/s...us+A85+&spos=1