The results for the Athlon 3800+ are clearly capped when running the video stress test in Half Life 2: Lost Coast. In terms of eye candy being turned on and off, even 3DMark fails to show that it is the case.
Even with the faster FX 60, Window’s Vista’s Aero Glass interface plays a small role in the performance when gaming. The results sometimes favor Aero Glass in terms of performance, and often times the difference is 1% or less. In other words, it looks like we’re well within the margin of error for our tests.