From WikiChip
Template:sandy bridge hardware accelerated video table

[Edit] Sandy Bridge (Gen6) Hardware Accelerated Video Capabilities
Codec Encode Decode
Profiles Levels Max Resolution Profiles Levels Max Resolution
MPEG-2 (H.262) Main Main, High Up to 80 Mbps
MPEG-4 AVC (H.264) Main 4.1 Up to 40 Mbps Main, High 4.1 Up to 40 Mbps
VC-1 Advanced, Main, Simple 3, High, Simple Up to 40 Mbps