Gran Turismo 4

[Proveyron]

Hey, just downloaded the 1.1.0.5594 SVN version
i'm trying to play gran turismo 4, here's my pc specs
Intel Core i3 540
4GB Ram
i don't have any graphic card, so i'm using the integrated graphics
the game runs well, with visible bugs, all menus are perfect, but the gameplay is very slow, something like 10FPS, but in the game window it says 60FPS.
is there any way that i can get better fps?
ps.: i'm using the default configs

sorry if i'm posting in the wrong section, thanks in advance ;D

[refraction]

Set gsdx to native and tick Allow 8-bit textures. Thats about all you can do without buying a graphics card

[Proveyron]

No changes at all, the game stills slow as hell, i think it's time to give up

[Zangetsu21]

Sadly not much you can do without a dedicated gpu. GT4 needs some juice to get it going at playable speeds :/