Well i bought the msi gtx 650 1 gb ddr5 video card today. But to my dismay, when i plug it in and started my pc, i get no video signal. My pc is i7 920, intel dx 58so mobo, zebronics 600 realwatts pro, 3 gb ddr3 ram, acer al 1716 17" monitor. Please help me pals !!