A couple of days ago I bought a new GTX670 the ASUS model as that one turned out to be the most quiet of the 670s in various tests and seemed like a rather decent bit of hardware.

However after installing it into my computer after it is done booting windows (which works perfectly fine) it just shows a black screen. Every once in a while the desktop may flash up and the monitor every once in a while detects a signal but most of the time it does not.
I've updated drivers, uninstalled and installed pretty much everything, but the problem remains.
I do suspect some kind of problem with the drivers as the card works perfectly well when Windows boots in protected mode...

Any suggestions?