regardless to the card , the +12v is very very low , now the question is, is it really so or everest have issues with your mobo sensor/or the sensor itself is faking? check voltages in bios twice , when the card is connected and when its not too , write em on paper and report back , if the +12v is much higher without the card then its gotta be the mobo , i suggest youll get a digital multimeter and measure the voltages with it , see these guides
http://www.driverheaven.net/guides/testingPSU/
http://www.ochardware.com/articles/psuvolt/psuvolt.html
http://www.driverheaven.net/guides/testingPSU/
http://www.ochardware.com/articles/psuvolt/psuvolt.html