Here is the order of it occuring.
It began to crash on Windows 7, ONLY when engaging the GPU (Youtube/divix/game, anything).
I moved to windows 8 for the heck of it and it was still doing it. I unplugged my DVDrom which wasn't really working anyways and I was able to use the GPU again. From this I surmised that my PSU isn't putting out enough power.
With it working, I just popped in a 5th HDD and it is now crashing on video again.
Do you think my PSU is not working?
Bear in mind for over one year it was working perfectly fine with the OC'd setup, just not the 5th HDD.