HI folks, looking for a bit of help here. I've just installed 2 MSI GTX 580 Lightning EXtremes into my rig but I am not gettng and display signal to my monitor. Now I didnt uninstall the previous GPU's drivers because I didnt think I'd have to because it too was a 580 just a referance design. I've tried HDMI and DVI and also without them connected with the SLI bridge. Any thoughts??? Thanks very much in advance.