Thanks for the reply, I'll give that a go a bit later on my friend's computer hopefully.
To update the original post. It actually does post beep, and I could hear it going into windows through the speakers. To test if the card was even being recognised by windows I just plugged in the HDMI to the motherboard (with DVI still plugged into the graphics card and it displayed windows, so it looks like it is just bypassing the graphics card altogether... It doesn't show up in device manager either.