Might Be Only Using One Processor

[Junside]

I'm not exactly sure yet but it feels like when I play DL its only using one core. I'm getting a lot of choppy response when heavy activity is going on on my screen. I have a Samsung Epic 4G Touch and ping is relatively low. It just feels the same as when I played on my Droid 2. On other games and activities, I never get and choppy fps or anything. Anyone know any answers?

Additional spec info

Samsung Epic 4G Touch (Sprint's Galaxy SII)
Android 4.04
Not rooted
836 max RAM
Too much available memory to remember lol