I just got a new video card and it seems that my computer is now running a little hot. How can I cool it down?

The video card is a PNY GeForce 9600GT and my power supply is a Cooler Master 430W. The minimum power requirement for the video card is 400W. Do I need a more powerful power supply? How can I lower the temperature of my PC?|||check to make sure you are not overclocking your graphics card as this can be risky and overheats your system. |||Get some software to manage the fan speed on the card and crank it up.