Before I start playing WoW, my CPU usage is normal. When I've played the game for more than like 15 minutes, the CPU usage spikes and I get choppy gameplay. If I alt-esc out of the game, around 2 mins or so after I do it, the CPU usage returns to normal and I can resume play. The process that is using the most is the System process. I have the latest drivers for my video card.
Anyone have a similiar problem?