Patch 7.1 FPS Drop

Ever since patch 7.1 has come, I've started to have enormous FPS drops. I usually am around 70-80fps but with this patch my screen freezes, I have to alt-tab back and forth to make it "update" the screen yet after another 2-3 seconds, the screen freezes again. I've tried repairing the files, re-downloaded the client etc. yet the issue still remains. Is anybody else having the same difficulties as I do?
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