You don't have an HDD as well as an SSD? My system freezes completely for a couple of seconds every time Windows spins up the HDD (for Windows housekeeping reasons - there's no data on it at the moment ). Disabling sleep on the HDD resolves this.
  My Aurora R7 freezes for multiple seconds a couple of times a day. It's more common triggered when doing disk related activities. I've tried all suggestions I could find on these forums: Nothing helped. I'm still having these hiccups and its problematic during competitive gaming. I used OOCT to scan my hardware for any issues. Funnily, it seems that running this tool while gaming prevents the system from ever freezing. I've gamed a lot with this running in the background and never had a single freeze. Without this tool running, I'm guaranteed to have at least 1 freeze every couple of hours. I've had this system for a couple of years and it started  happening randomly AFAIK, no specific update. More details: I hope anyone can help. Thank you in advance! 
Aurora R7, freezes for multiple seconds from time to time