Prior to Patch 2 my system ran DA:I rather well, even if running everything on ultra pushed my GTX680 (latest WQHL drivers) toward the upper limits. After patch 2 I experienced significant instability even in the minimally graphical Options UI, marked by uncontrolled fluctuation between full screen and windowed whenever I clicked the mouse.
After I finished griping and trying to adjust (and failing because whenever I tried to make a change the screen fluctuation lost my cursor as well as the clicks) I thought to disconnect my second monitor (which I use for widgets and comm programs and what have you).
Once I disconnected the second monitor and restarted my computer (i7 2.4GHx, 12 Gigs RAM) the instability was resolved.
So my guess is that something in Patch 2 placed greater demand on the video card, so much so that it could no longer distinguish and maintain the second monitor from my primary.
It may therefore help your graphics issues after patch if you do all that you can to relieve your graphics solution of unnecessary work.
I am now able to play reliably on ultra once more. YMMV
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