I tried Final Match Tennis at 533 MHz and it ran fine, Parodius ran to slow at 533 MHz, it ran fine at 760 MHz. I also noticed, that sometimes it still started to slow, as if the 760 MHz weren't applied. I was able to get the game running at 60 FPS then, when I opened the menu once and went to options, after returning to the game, it was fullspeed.