First of all N670GTX PE is a Power Edition. Those are equipped with Twin Frozr IV and have a custom high quality board. However Power Editions are not unlocked like Hawk and Lightning. MSI also does not promise that. I can't find an MSI statement saying you can overvolt more than with a standard GTX 670 gpu (due to nvidia's restrictions).
What they say is you can use Triple Overvoltage. Means you can not only adjust the voltage of GPU but memory and PLL. Triple overvoltage can be done with Afterburner 2.2.3 that you can get >>here<<
Also stop bashing MSI with terms like scam as that won't be tolerated.
Back to you thegilpins: Here's a forum review with oc results of the GTX670 Power Edition 2GD5/OC: https://forum-en.msi.com/index.php?topic=160505.0