I have the cpu+mem app and when i click on video in the media player then leave that on and go to the main screen to see my cpu+mem usage it goes and stays at 100% cpu for about 3 minutes then it calms back down.
And i plan on getting an extra mem stick to put another 1,300 vids on it so im tempted to overclock.
If i had an extra N900 i'd overclock and or if i was rich but i dont & im not so i'll pass.