Trouble rendering 4k content

So I've just upgraded my PC and all was fine when playing 4k content on YouTube with my R9 290, i5 2300 and 8GB XMS3 but suddenly a few days ago I've been having random blue screens. I didn't think too much of it since it happend/s rarely but when I went to watch some videos today it will stutter and the audio will go out of sync. 1440p work just great.

I can't seem to pin point the problem. As I've looked at all the processes I'm running an non seem to be using a large amount of resources. 


Any help would be much appreciated.