i just got a new mobo and when i hook the monitor up to the on board video my monitor just keeps saying there is no signal but when i put one of my 4x agp video cards in my computer as soon as i turn on my computer i get a black screen for 1 sec then it goes to the no signal warning and i tried a pci video card and nothing happens at all just like the on board video but what im wondering is my mobo has a 8x agp slot and im running a 4x video card so if i get a 8x is there a possibility of it working or do i have a faulty mobo.