ATI used the first day of Computex to announce its strategy for GPU-based physics processing. Radeon X1000 series graphics processors will be capable of accelerating the Havok FX physics API as a part of what ATI is calling a "boundless gaming" experience.
ATI had a demo system running a pair of Radeon X1900s in CrossFire with a third X1900 card dedicated solely to physics processing. This configuration was appropriately referred to as the "meat stack," and while it produced silky frame rates in a number of demos, it's not the only Radeon configuration that will support GPU physics. In addition to supporting three-card configs, ATI will also allow a pair of its graphics cards to split rendering and physics between them. The graphics card dedicated to physics doesn't even need to match the other graphics card(s) in the system; for example, it's possible to run a high-end Radeon X1900 XTX crunching graphics alongside a more affordable Radeon X1600 series card for physics. In fact, ATI had a demo system set up with a pair of Radeon X1900s in CrossFire and a Radeon X1600 XT accelerating the Havok FX physics API.
We have several movies available of this Physics PC accelerated lovelyness.
The download links below each point to a different movie:
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Note:
If you have problems downloading ATI GPU-based Physics Acceleration Movies,
please try to stop using your download manager
and avoid right clicking on files. Also, check
your firewall settings, because some mirrors may
require that you do not block the HTTP
referrers. 
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