Isn't that the same thing? If it helps you boot an unbootable overclock, isn't that helping overclock potential?
Quoting Juan: "This option is not for increasing stability of a OC that can already post and boot into an OS.". Because of this line, since the 47x multi can boot into Windows normally, I figured PPL overvoltage would do nothing to help.
I have now activated it and while the 48x crashed shortly after prime95 start, x47 is surviving prime for 40 minutes and counting.