Let's check the performance of the Radeon HD 6670, a mainstream DirectX 11 video card that costs USD 100.
Here is a snippet:
"The Radeon HD 6570 and Radeon HD 6670 were originally released at the beginning of the year as OEM products, i.e. available only for computer manufacturers. Last week, AMD released them on the retail market, with a suggested price of USD 80 and USD 100, respectively."