Dolphin runs slowly

[Xiloscent]

I've messed around with some settings, and in some areas of some games everything runs nice smooth and at the right speed, but when it gets to a really action filled area, it tend to slow way down, like i could count the frames, I've tried the frame skipping idle skipping and all that but it doesn't seem to change much, is it dolphin or is it me? my specs are in my sig.