Instead of calculating these signatures on the fly, the game stores them in this .bin file to speed up loading times and ensure data integrity.

Some poorly optimized games have a bug where they flush the cache on shutdown. Check for game patches or forum threads (e.g., Steam Community, Reddit). A workaround is to set the file to after creation (right-click > Properties > Read-Only), but this may cause permission errors.

Currently, gfpakhashcache.bin is a "dumb" index. It tells Cemu what a file should look like (the hash), but when a user installs a mod that replaces a file, the cache often becomes invalidated or causes the user to clear their shader/pack cache to prevent conflicts. Users rarely know which specific files a mod overwrites until the game crashes or glitches.