Arkham Knight, a PC game so broken that its publisher Warner Bros. had to withdraw it from sale, was released in June. It's taken until September, but a patch to (hopefully) fix it is rolling out now.
The update popped up earlier in the week for beta testing, but WB announced today that it's now available "for those who already have Batman: Arkham Knight for PC". Note that this doesn't mean the game is back on sale for anyone holding off; at time of posting, Arkham Knight was still unavailable for purchase on Steam.
Below are the important patch notes:
Reduced frame rate hitches
Optimizations for system memory and VRAM usage
Improved performance on all GPUs (requires the latest drivers)
More Comprehensive In-Game Settings
Fixed low resolution texture bugs
Fixed hitches when running on mechanical hard drives (HDD)
In addition to the above, we're continuing to work on the following for future updates:
Adding support for SLI and Crossfire
Adding support for the latest DLC & Season Pass content
Adding support for additional updates such as Photo Mode
Continued improvements and bug fixing for a Windows 7 specific memory issue that occurs on configurations with 8GB of system RAM and some NVIDIA GPUs during extended game play
Continued improvements for Windows 10 specific issues on systems with some AMD GPUs
I'd test it out, but I'm one of the arseholes who could run the game fine first time around, so if you've downloaded the patch and are noticing big improvements (like those who tried it out earlier in the week discovered), let us know below!