Graphics Card not Recieving enough power?

clutchstrike

Distinguished
Dec 3, 2006
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I installed Windows, and I was installing my graphics card driver. The installation finished but I get a message saying that there is not enough power for the card to operate. I have a Thermaltake Purepower 600W PSU with a XFX Geforce 7900GS Extreme. I attached the wire that says PCI-E on the PSU to the graphics card. What is the problem?
 

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