Atikmdag Patcher (also known as AMD/ATI Pixel Clock Patcher) is a small utility that modifies AMD/ATI video drivers.
It removes the built-in pixel clock limits — 165 MHz for single-link DVI and HDMI, 330 MHz for dual-link DVI, and 400 MHz for VGA — allowing higher resolutions and refresh rates that would normally be blocked.
You run the patcher after installing the driver, reboot, and it enables the higher timings. It works with a wide range of Catalyst and Adrenalin drivers.
| Atikmdag Patcher — Quick Facts | |
|---|---|
| Name | Atikmdag Patcher (aka ATI Patcher) |
| Who made it | Community developers (various independent authors) |
| Targets | atikmdag.sys and similar kernel driver files in older AMD packages |
| OS compatibility | Windows 7, 8, 8.1, 10 and Windows 11 — effectiveness drops on modern drivers |
| Typical size | Very small utility (under 1 MB) |
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