How to view graphics card in windows?

I have just installed my sapphire radeon 6870 on my z77x d3h motherboard running intel i5 2500k CPU attached the 2 connecters to the power supply.. the fan off the GPU is spinning but i can't seem to be able to use my graphics card on windows 7 ultimate?

Basically what i want to do is make sure it's running and make it the main graphics card rather than the intel chipset graphics how do I do so?
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More about view graphics card windows
  1. Have you downloaded and installed the video driver from AMD or Sapphire?

    Need a bit more info on this.
  2. Also... plug the monitor into the GPU output, not the motherboard's.
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