No, it shouldn't. I use the same drivers on a far inferior card and can still push 2xIR + 8x CSAA in OGL in most of my games.
Are you trying to use any other sort of settings forcer or injector with dolphin? I'd recommend making sure there's nothing other than plain dolphin running dolphin. Unless it's a demanding game and I didn't know, you should have no problems running either Double Dash!!! or Mario Kart Wii.
Just out of plain curiosity (since it's shown itself to be a problem to myself and my peers before), what is your power supply? Some research, along with my own experience, has lead me to the conclusion that having a bad power supply can cause performance issues.
Are you trying to use any other sort of settings forcer or injector with dolphin? I'd recommend making sure there's nothing other than plain dolphin running dolphin. Unless it's a demanding game and I didn't know, you should have no problems running either Double Dash!!! or Mario Kart Wii.
Just out of plain curiosity (since it's shown itself to be a problem to myself and my peers before), what is your power supply? Some research, along with my own experience, has lead me to the conclusion that having a bad power supply can cause performance issues.
in a perfect world we would all be piles of sand with no ability to form coherent bodies of body