dj, yep i had slowdown on gp4 and the sound accelaration seemed like it was the cause....anyways GP4 was heavily flawed, as it could barely reach 60fps and was bug riddled like mad....so there could have been a number of things.
It's strange though, how PES3 seems to require a hellof a lot of CPU power as well as extensive physical ram, and the mem from the graphics card!! obviouisly there has been no optimisations. Just shows Konami are still inexperienced in the pc gaming field.