Hi, When I had a GTX280, I could play Crysis & Crysis Warhead DX9 or 10 at 1080P and my full 60hz refresh rate. However, since moving to ATi HD5870, I get the following using 9.11 or 9.12 at native 1920 x 1080: Crysis DX9 - full 60hz Crysis DX10 - locks down to 24hz Crysis Warhead DX9 - 25hz Crysis Warhead DX10 - 24hz If I run the game windowed, then full 1920 x 1080 60hz returns for all modes. But this is a pretty poor solution. However if I run under 9.10 drivers then I get both DX9 & DX10 lock at 50hz. This again isnt ideal though as it means I cant use the latest drivers for my other games easily. Any help would be much appreciated. Love the card but not enjoying this bug... EDIT: just to add, all other games are great and no issues with refresh rate regardless of DX9 or 10 and 1080P resolutions. Connected via HDMI, but problem persists under DVI too. Thanks.