well, open it up and look on the bottom, just left of the center, it will show you your fan speed, the gpu temp, and the "temperature of chip" i am not 100% of the location of that sensor.
you can also adjust your clock speeds, but i wouldnt mess with that until you read up on overclocking, unless you already have read up on it. and, a word of advice, dont trust the "find max core/mem". i used it and it went higher than it should have (not enough to damage the card) and it was artifacting like crazy.