You can download FRAPS for free, and that runs in the background displaying FPS in the corner of the screen. Its very useful and can even record video of you playing, and save screenshots:
Its kewl that
I wish I had a monitor like that, hehe.
It does surprise me though that you can run at the highest HD resoloution with that 5800 Ultra you have there. I doubt my card would do it, but mines probably alot worse than yours, hehe.
My monitor can support 1280x1024 so its higher than the 1280x720 needed for the first HD resoloution, yet, i set that on the desktop, and it was stretched since its a widescreen format... oh wells
Post back with your FPS