Adobe Bridge/Photoshop doesn’t remember the folder path in Camera RAW Cache Settings in Camera RAW Preferences window. Every time when I want to set my own folder Camera Raw Cache and its maximum size, I click OK and return to Camera RAW Preferences, I see default path (C:/Users/Name/AppData/Local/Adobe/CameraRaw/Cache/) and maximum size as 1GB.
[Win 7 64-bit, LR 5.5, Web&Design CS6]