I've been playing crysis 1 lately since I was caught up with C2 and had this annoying problem. But just lived with it, don't expect crytek/ati to fix a problem for a 4YO game anyway. Today tho, after running Crysis 2 DX11 for the first time and quitting, when I relaunched the application I had the same black borders I have in C1.
After looking up on the forums, I found this thread: http://forums.amd.com/game/messageview.cfm?catid=279&threadid=124481
Basically the problem happens with DX10 (for Crysis 1) and consequently in DX11. It's kinda a refresh rate problem if did understand well. Here's the solution, step by step, using CCC 11.6:
-Open up your driver panel
-In preferences (top-right), switch to advanced view
-Select "My Digital Flat-Panels" and then "HDTV Support (Digital Flat-Panel)" in the submenu
-Make sure you're tuning the settings for your right monitor!
-In "Predefined and Custom HDTV Formats", scroll down to your resolution (for example: "1080p60 standard...") then click Add
-Click on the lower arrow that appears on the screen, it will change your resolution to 1920x1076
-Select "Accept" then Apply
You do actually lose a couple of pixels but it ain't really noticeable. And it will do the job until it's fixed for good by either ATI or Crytek.
Note: if you're experiencing the same problem but you have an Nvidia card, I think you can tune your refresh rate from your drivers without changing the resolution! But I'm not an expert so I have no clue if that will work or how to do that
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