that's the only benchmark i could find of 720p, and though this was beta and drivers and optimization has come a long way since, his HD7660D is roughly equivalent to the HD 6670, so he should expect numbers not much higher than that, and that's with low settings too
ah that's unfortunate, are newer computers/parts priced very high in Sweden? Cause if they're about the same throughout their lifetime, then I would suggest waiting for the new Kaveri APUs to hit the market and be built into PCs, it can handle a lot more than the current gen APUs can (last I heard they can run BF4 at 1080p smoothly so there's that too).
If you don't want to wait, try to see if you can find a fairly priced Richland APU instead (the A10 6800k instead of the 5800)