thanks for the response ill try it out, i ran 3dmark advantage and only got around 150 points higher honestly i think my cpu is holding back my rig anyway
I'm suprised that you didn't get a lower score with 3dmark vantage. It doesn't work the way you might think with that benchmark. When they test out physX, they do it without any graphics power being used. They test it independantly. If it was higher, it probably meant you left your 460's have physX on, so the demo just had a higher score due to standard deviation.
A dedicated physX card is only useful when you are both rending high quality graphics and doing phsyX at the same time.