AMD has launched the Radeon HD 7790, the company's latest mid-range DirectX 11.1 graphics card, to fill the void between the £100 HD 7770 and £160 HD 7850. Built around the same 28nm process as existing 7-series GPUs, the HD 7790 uses a revised version of the Graphics Core Next (GCN) architecture codenamed Bonaire - and could be a major indication of what to expect inside the Xbox 720 console.
http://www.expertreviews.co.uk/grap...hd-7790-architecture-links-it-to-xbox-720-gpu