Random slowdons in dolphin help

[Raiku]

Heya guys great work on the emu. Ive just been wondering if there is anything i can do for the random slowdowns that occurs. itll be emulatin nice and smooth no area changes or anything and than boom lag city 5 seconds or so later back to nice and smooth.

any ideas.

1.8 core 2
geforce 9600gt superclocked
4 gigs of ram
win 7 32