There have been a few CPU cooler mounting hole changes over the years and we have released various brackets to accommodate for those such as the AM1 or AM4. In order to provide a more unified and flexible upgrade path for older cases, we are making our current adjustable arm design available as a kit for existing FC case owners. This allows the included CPU mount to be used with all current (and hopefully future) CPUs by simply replacing the older upper mount with the UM2 kit.

For full product information, please visit the main product page here - https://streacom.com/products/um2-universal-cpu-mount/