K, will head over to your other thread when I get back from work later on today, being that you will also be purchasing a new PSU as part of the upgrade you can always come back and test this MB with it first.
That is normal behaviour, when the BIOS detects the presence of an add on video card be it working or not the MBs integrated graphics are disabled by default, this can only be changed on certain MBs that have certain CPUs, in your case the i5-3570k CPU has HD 4000 graphics but for this to also work alongside an add on GPU your MB must allow you to set the primary video as Intel integrated + integrated video always enabled.Yeah it seems to be that even when I don't connect to the video card if it is attached to the mb then there is no video.