Download AMD / ATI Pixel Clock Patcher (Atikmdag Patcher)

September 9, 2021
Version V1.4.7
Size 3 Mb
Architecture 64-bit

Download Atikmdag Patcher for Windows

Users have a chance to use AMD/ ATI Pixel Clock Patcher to boost the performance of video cards. The software removes 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 to achieve better results. Users mining with ATI / AMD GPUs should use the tool. In addition, AMD/ ATI Pixel Clock Patcher has features that enable to fix video drivers and remove BIOS signature verification.

ATI Pixel Clock Patcher

Today you can find other software to remove the BIOS signature verification, but when you choose AMD / ATI Pixel Clock Patcher it won’t cause any difficulties in usage. The latest version of AMD/ ATI Pixel Clock Patcher 1.4.7 is compatible with Catalyst 11.9 to Adrenalin 19.9.2. You can use it with future versions as well. Installation of this software takes a couple of clickes and minutes. To use the tool, you need to follow a simple instruction.

How to install AMD/ ATI Pixel Clock Patcher?

  • Download
  • Unzip the archive and open the file ‘atikmdag-patcher.exe’
  • AMD/ ATI Pixel Clock Patcher will find all the restrictions, you select ‘Yes’ to fix and re-sign the driver
  • Reboot your computer

If you have problems or errors, uninstall the graphics card driver using DDU Display Driver Unistaller, then reinstall the driver and apply the fix.


  • Windows Vista or later GPU 5000 Series or later

You can use all versions of drivers as the software is compatible with all of them. AMD/ ATI Pixel Clock Patcher finds the set limits itself and removes them.

CrossFire Requirements

R9 285/290 / 290X / 295X2 and newer cards can handle higher resolution frequencies without CrossFire bridges.


1.4.7: New SL-DVI / HDMI limit found.
1.4.6: New HDMI-DVI limit found.
1.4.5: Updated for 17.4.1. New DP-DVI / HDMI limit found.
1.4.4: BIOS signature verification found.
1.4.3: The fixed limit of HBlank for 16.12.1.
1.4.2: Found 56 horizontal blanking limits (HBlank).
1.4.1: Fixed a bug due to which the driver did not load correctly in earlier versions of Windows 10.
1.4.0: Updated for 16.9.1. Changed the way the driver is located and fixed. Replaced the limitation of 640 × 480 with the restriction of low resolution. Fixed VGA limit for 32-bit.
1.3.6: Found a limit of 10 permissions for Radeon settings.
1.3.5: Updated for 15.11 Crimson. A limit of 640 × 480 was found for the Radeon settings.
1.3.4: We tried to improve the DVI / HDMI limit for new drivers. Removed blue screen workaround for 14.6 / 14.7.
1.3.3: Updated for 15.3. Fixed limit DVI / HDMI for 32-bit.
1.3.2: Updated for 15.2. Fixed limit DVI / HDMI for 64-bit.
1.3.1: Find the HDMI 1.3+ limit at 297 MHz. Perform 3 times to correctly upgrade an existing installation.
1.3: removed the blue screen workaround for 14.9. Return to self-signing if the signature failed.
1.2.7. Trying to get around some antivirus false positives. Reprint is not needed.
1.2.6: fixed AMD APP encoding for 14.6.
1.2.5: Updated for 14.6. Fixed limitations of TMDS and VGA. Implemented a workaround for the blue SYSTEM_SERVICE_EXCEPTION screens.
1.2.4: Updated for 14.4. Fixed SL limit on DL-DVI.
1.2.3: Updated for 13.30 and subsequent releases of 14.x.
1.2.2: Found a new HDMI limit for 12.9+.
1.2.1: Found a VGA limit of 400 MHz.
1.2: Test mode is no longer required.

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