The worst thing that could happen, is that'd you'd end up with what you have now, a 12 pipe pro vivo. You could enable all 16 pipes (if they are not lasercut) and still maintain pro speeds. I was very weary of doing the XT mod from my powercolor vivo, but i gave it a shot and said what the heck. It works like a charm, its watercooled so it never goes above 38 degrees.