Well I ran 3D and got the same results with the 520 in place and out.
I had to run it using an old monitor as the tvs were occupied. Not sure how much dif that would make, as the old monitor is a mere 1280x1024.
Thought I got rid of that piece of c$@p. Guess it came in handy after all. Time to hunt down a decent monitor.
I did continually receive error messages with both scenarios so I have to contact Furmark.
That should be interesting.