will my asus p5g41c-m lx support sapphire ati 6790 because i thing the main power conector cable on the mobo will block it becoz the graphic card is quite big .plz help me coz i dont want to change my mobo. thanks
I think you may be right, it looks like a long GPU in the PCIe slot might block the main mobo power connector. It is really hard to tell from the images, but it will be close. If you are able to fit it then the cables from the main power connector will definitely be resting up against the graphics card.
Mini-ATX motherboards make it really hard to fit the larger, more powerful graphics cards.