1.4.3: The fixed limit of HBlank for 16.12.1.1.4.4: BIOS signature verification found.Compatibility: Atikmdag-patcher 1.4.7 is compatible with all versions of drivers, the program itself finds the set limits and removes them.CrossFire Requirements: R9 285/290 / 290X / 295X2 and newer cards can handle higher resolution frequencies without CrossFire bridges.Requirements: Windows Vista or later GPU 5000 Series or later.Then you can select a higher refresh rate using programs for fine-tuning video cards. The program will find all the restrictions, select “Yes” to fix and re-sign the driver. Unzip the archive with the program and open the file atikmdag-patcher.exe. Instructions - Download: atikmdag-patcher-1.4.9.zip
All you have to do after installing the AMD video driver is to download the tool and run “atikmdag-patcher.exe”, then just reboot. The current latest version 1.4.7 is compatible with Catalyst 11.9 to Adrenalin 19.9.2, although it can be used with future versions. There are other solutions that allow you to override the BIOS signature verification, but using the AMD / ATI Pixel Clock Patcher tool is by far the easiest.
This tool also has the ability to fix video drivers and remove BIOS signature verification. ToastyX’s AMD / ATI Pixel Clock Atikmdag Patcher has long been used to modify AMD / ATI video drivers to provide better performance by removing the 165 MHz clock limit for single-channel DVI and HDMI, the 330 MHz limit for dual-channel DVI, and the 400 MHz limit for VGA Which is useful for everyone who is mining with ATI / AMD GPUs.