Intel OpenCL drivers could be required for some processors (Xeon, ...) to run some filters (KNLMeansCL, QTGMC, ...) - staxrip/staxrip GitHub Wiki
This has been reported by user vonH.
Xeon users may need some extra runtime to run KNLMeansCl and QTGMC.
- Go to Intel support site, search for "opencl runtimes" and download Intel® CPU Runtimes for OpenCL™ Applications for Windows 64.
The direct link to the search results (at the moment of writing this page) is https://software.intel.com/content/www/us/en/develop/tools/opencl-cpu-runtime.html?wapkw=opencl%20runtime
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Also you could need to replace the filter's dll inside Staxrip Download from here https://github.com/Khanattila/KNLMeansCL/releases/tag/v0.6.11 an older release more likely to work with Xeons, and put the x64 dll you find inside the archive in here \Staxrip\Apps\Plugins\Dual\KNLMeansCL (replacing the existing one)
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All other runtimes must be up-to-date as required for proper operation of Staxrip (check the App Manager in Staxrip)
IF you have a Ryzen processor untested on other cpus
- Simply download and install Intel® CPU Runtimes while ensuring other runtimes are up to date. QTGMC will work great on a ryzen processor with intels Open CL driver plus the included KNLMeansCL.dll.