Yes my psu is enough.
I have a high end XFX 850. That's not the problem.
When the crash happens, the screen goes off to no signal but the PC is still on so its not psu.
Maas for the drivers, yes I have installed bean new drivers when I first did crossfire.
I was reading online, it's something to do with the UVD clocks. When playing a video it goes to default or something.
Which I am at default. I went into a video, settings and turned off hardware acceleration and it hasn't happened as much. I could not disable it via display it would not let me. Had to load YouTube and play a video to do it.
I am now using the 13.8 beta drivers which still has it.
I am extremely annoyed that I chose AMD because I support them and spent well over £600 building this machine for AMD only and having this problem.