How do i set up my 5770 to work properly

[ATAG_Dutch]

Yeah, Lobi's like that.

What baffles me is the overclocking of the card making no difference either, neither to frame rate nor render speed from what I can see, so maybe mine's stuck at a low level like yours, although I'm not sure where to look for this.
If you let me know I'll try the same method as you for comparison.

Calling Orpheus!

Edit, just seen your edit - of course! that's why I left my first post!!