Mr E:Y'know what's funny? I have a freakin Nvidia 6150 SE (yes yes I know) and when I put the settings to low: game looks and runs GREAT, even BETTER Online. Except for those cutscenes where there's a ton of stuff going on. My PC can run Halo CE excellently with everything maxed out, yet there was slowdown in snow levels. I don't understand why some of you guys can't figure it out:
Lower your resolution
Turn off some settings
Decrease detail level (ranges from Very High, High, Medium, Low).
Sorry for the double post, but I did all of that and it's still really choppy for me, and I know it's not my Internet connection.