low fps, is my computer strong enough?

[oleesrl]

I get really low fps on zelda - twilight princess, 12-24FPS.. anything i can do to improve it?

when i look at my process-manager it only uses 55-65% of my CPU's capacity.

AMD A10 4x2.1 GHZ
AMD Radeon H 8610G + HD 8670M dual graphics 2GB
8GB Ram