Battlezone 1

Well it goes like this:

I join or make a game, I enter the game to start playing.
When I join, immediately the FPS starts climbing to higher numbers (starting from 60 and the highest it has gone is 70-80).
Software mode just makes it worse (by skyrocketing my FPS to the range of 200-300+).
I run the game with normal settings (i.e. not using the config utility at all).

The way I see it, it seems not possible to bring my FPS down to 60 (like it used to).