"i swear i have seen the game giants and it doesnt look that intense."
Are you sure you have seen Giants? It is the most intensive game I have ever seen/played/owned by a wide margin. If you turn down all the gfx options then it doesn't look all that impressive and will play quite a bit smoother, if you have everything cranked(which is the default for the Ultra) then ~20FPS overall isn't too surprising. Likely he is CPU limited(my GF DDR only drops a couple FPS going from 640x480 to 1152x864).