All graphic cards starting with the HD5xxx are part of this new evergreen family which is based on the 40 nanometer fabrication technology and has support for the new DirectX 11. The HD5870 is the fastest single-GPU graphics card available, the HD5850 on the other hand is slower but with lesser power consumption, cheaper and yet a powerful graphics. The detailed specifications and review links can be seen below.
Update: Saturday, November 21, 2009
AMD launches the fastest graphics card on the planet - HD5970HD5850 Specifications:
RAM Size: 1024MB GDDR5
Memory bus size: 256bit
GPU frequency: 725Mhz
Memory frequency: 1000Mhz
Stream Processors: 1440
TDP (Max): 151W
DirectX Support: Version 11
Price: $299
HD5870 Specifications:
RAM Size: 1024MB GDDR5
Memory bus size: 256bit
GPU frequency: 850Mhz
Memory frequency: 1200Mhz
Stream Processors: 1600
TDP (Max): 188W
DirectX Support: Version 11
Price: $399