Sure seems that way Bond, now that I have tried two I am resigned to the fact that I either get a new motherboard along with a 780Ti or I may make one last effort along Charlie's suggestion and pick up one of the latest gen AMD cards to see what happens.
I have contacted ASUS too to see if they have any tech guru that can tell me why this is happening to this card/mobo combo too, though I don't expect much.
Once I get a new AMD or if some solution comes along I'll come back and update this thread.
Going to give props to NCIX for letting me return another video card. Swapped out the 780 for an ASUS 290x DirectCU. Sadly after installing it the behaviour is exactly the same as the 780s, no video signal at all.
I am thinking something along these lines could be the issue http://forums.guru3d.com/showthread.php?t=387990. The BIOS' on the latest cards are likely not getting along with my motherboards BIOS, though I am not sure how to go about flashing a video card BIOS, especially when I can't see anything on screen.
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