Hmm well when microstutter from CF is seen you will see a fluctuation in framerate. If you framerate is a constant 60fps you might have an issue with another component. I would not just live with it because what you are describing is not normal. When BF3 plays at a smooth 60fps it's gorgeous. U will have to do some trouble shooting.
Ok does this stutter happen with every game or just BF3?
If its every game the start looking at components. First test the components you can. Ram with memtest. Stress test CPU watching temps and stability.
Then exchange out each component one by one until the problem is fixed the most simple first. Cables. Try to make sure crossfire bridge connection is on tight and try another if possible. Then cable to monitor/tv. Next try another monitor or TV. Then go down the list..
I new one guy who described this type of stuttering on even a constant 60 FPS and it ended up being a bad CPU. But he had the stutter on all games and even YouTube videos. It looked like this. http://www.youtube.com/watch?v=TgM2O8Ci4SU&feature=related