Spotted this score on 3DMark 03's result browser, a guy claiming to have modded his x800 pro to a 16 pipe x800 xt. Screenshots of the score details and ATi tool clearly showing 16 pipes enabled can be viewed here.
This was discussed before when Chinese site Unkia claimed they had found bridges that need to be joined to reclaim 4 pipes. Xbitlabs tried this however and did not have any luck.
thanks L33