or if any 1 knows if the ageia physics cards make any dif with US??
Unfortunately Universe Sandbox doesn't run any faster with an ageia physics card.
It's probably rather a problem of the mainboard which has to calculate all the positions and velocities of the particles. Anyways, I think there are already quite a lot of cheap multicores out.
Although Universe Sandbox only supports a single core at the moment. As soon as .NET 4 comes out I'll be releasing a new version that should run at least 40% faster on dual core systems.
Bottom line: A faster computer is more important than a faster video card with Universe Sandbox.
And Arata: Don't forget that you can edit your previous posts instead of adding a new one.