Just some numbers about OC/DC in Chankast that might be interesting for some people. I ran each game at 640x480 windowed, no AA/AF, entered practice/sparring mode, let them sit for a while, and then stared as the FPS counter.
Soul Calibur (U)
50% = 83-90 FPS
100% = 91-95 FPS
125% = 77-78 FPS...