Topic on Talk:Borderlands 2
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https://forums.geforce.com/default/topic/821371/borderlands-2-low-fps-on-gtx-780ti-and-3d-right-click-not-working-/#4500992
https://forums.geforce.com/default/topic/932795/geforce-900-series/possible-fix-borderlands-2-pre-sequel-gtx-970-physx/#4866899
EDIT: it seems there's also a performance problem between W7 and newer