Low Fps on PBE

After an update that happened about 2 days ago, I've been getting 25-35 fps. On Live, I get 100 fps, and did before the update. It's not due to the snow map, because on training mode I get low fps aswell. Switching graphics does nothing, and if anything putting it on highest setting makes my fps go up about 3. Would really appreciate a solution, or please comment if anyone that reads this has the same problem, I just wanna know if anyone else has the problem cause no one in my games do.
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