Highly unlikely...video card performance is usually tied directly to video card drivers.
However, there are a few beta testers claiming a somewhat significant system performance increase with SP3.
General opinion around the 'net so far is that there was very little performance increase in SP1, so I'm not sure why you're asking if a perf increase is true...
However, neither service pack has been finished, and perf is usually one of the last things coded up for both operating systems and service packs. So there is no way to answer your question at this time.