No, trust me, my 9800 pro will kill a 5700 anyday. I do have AA/AF enabled, which is likely that's the problem. Oh yea, and full graphics settings at 1024x768. Trust me, a 5700 is no match for a 9800 pro overclocked fully.
My system isn't overclocked much though otherwise, the mobo sucks (4x AGp, but it doesn't make a difference anyways really) and BIOS is junk.