"The Sapphire HD5850 Xtreme is a low-cost and powerful DX11 option. The Sapphire HD5850 Xtreme uses an original cooler design that is significantly quieter and cooler than the loud blower-style fan used on stock HD5850 designs. The Sapphire HD5850 has 1440 stream processors and 72 texture units with 1GB of GDDR5 memory, able to handle even the latest DirectX11 games. Although the HD5850 Xtreme edition comes with one less DVI port and one less CrossFireX connector, it is priced below $150 USD, offering huge savings compared to regular HD5850 video cards, while out-performing an NVIDIA card at the same price range."
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