NVIDIA Pixel Clock Patcher modifies the NVIDIA video driver to allow higher resolutions and refresh rates by removing the 165 MHz pixel clock limit for single-link DVI and HDMI, the 330 MHz limit dual-link DVI, and the 400 MHz limit for SLI and 400/500-series GPUs.
Two executables are included in the zip file:
Run nvlddmkm-patcher.exe unless you have a Catleap/Tempest/QNIX/X-Star with SLI or 400/500-series GPUs, then you want to run nvlddmkm-patcher-full.exe instead.
If any limits are found, click "Yes" to patch and sign. If a limit is not found or multiple matches are found, the patcher needs to be updated.
To restore the unpatched driver, rerun the patcher and click "Yes" to restore from backup.
Please note some of the known issues and don't use them if it could affect you:
1: The full patch breaks HDCP support. It is only needed if the pixel clock is higher than 400 MHz with 400/500-series GPUs or SLI with 600/700-series GPUs until 391.35. 2: NVIDIA cards will not reduce clock speeds when idle if the vertical blanking/total is too low. 3: 400/500-series cards will not reduce clock speeds if the pixel clock is higher than 404 MHz.
The "Author" link at the top of the page takes you to the forum to get support.