Some games will have a built-in frame limiter which will cause the game engine to attempt to meter the frame rate at the rate you set it. Other games don't, and you'll have to use vsync or some other tool like D3DOverrider to work around it.
Vsync will lock your frame rate to the refresh rate of your display, in order to prevent tearing. However, it will not insure that your frame rate will always stay at 60. If your machine is getting worked hard enough to drop the frame rate below 60, then there's not much you can do about that aside from upgrading hardware.
If it's just the noise that's bugging you, then a better alternative might be just to get a third party heatsink for your card which doesn't make as much noise.
Do not meddle in the affairs of archers, for they are subtle and quick to anger.
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