The Radeon HD 5570 is designed for small form-factor PCs and it too supports DirectX 11 in Windows 7. You can find the specs for this graphics card here on AMD’s product page. For this card, they were able to jam the same multimedia capabilities as what AMD calls the “enthusiast-class” ATI Radeon HD 5870 graphics card into this power efficient, lower priced graphics card.
AMD’s press release doesn’t include a price other than “affordable price”.
Of course both the ATI Radeon HD 5570 and previously announced Radeon HD 5450 carry the Compatible with Windows 7 logo – as does AMD’s entire HD 5000 Series of graphics cards.