A lot of FPS but slowly games?

[gioblack]

Hi! I have an Aspire 5920G with this specs:
Intel Core 2 Duo 8100 (2,1Ghz)
Nvidia Geforce 8600M GS 256MB dd3
4GB ram DDR2

When I start to play with donkey kong kountry , my laptop make 22-40 FPS but the game go at 65%... is the GPU? I can do something? Or is an issue of Donkey?

Thanks for the answers!

[Zee530]

That processor wont get u full speed, thats as much as it can muster

[gioblack]

So the issue is the CPU?

[Zee530]

Yeah, but you can also try overclocking, but i'd suggest buying a new laptop if possible, an intel i5 if you insist on using a laptop, with a clock speed of 3.0 or higher will get you full speed on GC games and most Wiis