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Originally Posted by WernerSobe
Physics Cards are not to improve the graphic. They are designed to calculate the movement of objects, fluids, gases etc... They relieve the CPU not the GPU. CPU is not designed to calculate such things.
However basicly it will improve the graphics in some way. Explosions, Fires and Fluids looks much more real. Objects that are being destroyed look much more realistic. Many things can be moved and fly around at same time.
in example you can have a game where you see cars crashing in each other and you can calculate the deformation in real time making every crash look different.
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One thing to keep in mind is that while the Physics Cards indeed calculate the physics (if the game has dedicated support for this specific Physics Card (since there is no real standard at this point), otherwise the impact is exactly 0%) and thereby relieving the CPU of some work, the graphic card still has to display the improved physics. The tests of GRAW that I read stated that the graphics with a Physics Card actually slowed down, since the implementation of the Physics Cards was used to IMPROVE the existing physics model, thereby creating more fluids, explosion fragments, particles, etc. that were calculated very fast by the Physics Card, but required the graphics card to work harder, thereby slowing down the actual game ...
Totally useless at this point in time, IMHO.