It hits around 70% cpu load and crackles/stutters when playing a kick, a snare and a 3xosc. However when i put it on my pc (which has a 3.4 ghz quad in it) i was hoping for it to run a lot better than on my laptop but instead it is pretty much un-usable. Anyway on my laptop i use fl 9 and it never crackles and the cpu load rarely goes over 50% (this is a 2.0 ghz dual core and around 4 years old) and the buffer length is at the highest so that i can use it without annoying stuttering and crackling. Hey everyone, I decided to put fl studio onto my desktop instead of using it on my laptop because it over heats a lot now.