Barefeats have posted tests of dual 2, 2.5 and 2.7 powermacs carrying out various graphics intensive tests. The 2.5 beats the 2.7 hands down in every one. Even the 2 beats the 2.7 in some tests. Have apple changed the logic board design or controller chips on the latest machines? http://www.barefeats.com/threeway.html They couldn't explain the results and ask for explanantions, anyone here got any?