Today AMD releases their HD 6670 which is priced at $100. The card is based on a brand-new graphics processor called "Turks" with 480 shaders and GDDR5 memory. Like all recent cards from AMD the card supports EyeFinity, DirectX 11 and full HD video acceleration.
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips