Ok so ignore what I said about 'Debugging mode', I was just lucky the 2 times I tried it. It's still a gamble wether it loads or not.
However, I was intreged about the power supply talks, so I took the card to work today and tried it with one of the 32 bit editing machines, and to my suprise, there was no problems, the 1st PC t has worked on! and it just so happens that it was has the higher psu wattage out of the tested systes so far, (650w) i had already tried it on a 650w, but it was a bottom end cheap one.
So im now tempted to go for a higher watt power supply, but im a little split about it, surely it doesn't need that much power