You can then add higher refresh rates using the NVIDIA Control Panel or Custom Resolution Utility (CRU). If a limit is not found or if multiple matches are found, the patcher needs to be updated. If all limits are found, click 'Yes' to patch and sign.
(Catleap/QNIX/Tempest/X-Star users with 400/500-series GPUs: run nvlddmkm-patcher-full.exe instead.)
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 for dual-link DVI, and the 400 MHz limit for SLI and 400/500-series GPUs.
