When updating drivers from nvidia for new dx10 games like bioshock it tells you to update your driver to the new 163.44 beta driver from nvidia and when updating your driver it removes the msi overclocking utlity and this is a good utlity that works. It gives you control over your fan speed as long as your card supports fan control. And you can also over clock your card to its max.
Do this with caution though as overclocking your video card can cause damage. It is not a replacement for MSI drivers but simply an overclocking utlity that works with most nvidia video cards.