I found this at Tom's Hardware. Its not a lot of detail but at least it explains what each memory setting is and if a lower or higher value is better. Every little bit helps.
http://www6.tomshardware.com/mainboard/01q3/010806/amd_760-05.html
http://www6.tomshardware.com/mainboard/01q3/010806/amd_760-05.html