i have biostar g31 mobo,core 2 duo 2.2ghz procc,cooler master 600w psu and xfx 9800gtx gpu.When i connect my monitor to the gpu via dvi to vga adapter no display comes on the monitor,when the gpu is on the mobo and the monitor is connected to the onboard intel igp still no display comes.Only when i remove my gpu from the mobo and connect the monitor to the onboard graphics i get display on the monitor.This is strange.What could be the reason?