It took nearly two weeks, but on December 7th, 2011 a patch was released for Batman: Arkham City that `fixed` DX11 performance, but only for those running 64-bit versions of Microsoft Windows. Those running 32-bit versions of the operating system will have to wait for another patch that will come at a future date. We played the game on the patch with various card and while single GPU gaming in DX11 mode on Batman: Arkham City has greatly improved we did still find some issues..."
You do software updates to get the most from favourite programs right? Updating a motherboard BIOS can in a timely manner is also critical. The guide to Flashing a Motherboard BIOS spells out the often complicated steps in plain english. PCSTATS Tips