What change they made that it can't be reversed? You mean about Ghz Edition, voltages etc? The only thing I can assure you, when with a previous set some guys reported they've gained Mhz with less voltage, that time it didn't work for me. With this latest driver ( 19 July ), it truly works... For example, I couldn't play BF3 at 1Ghz with less than 1.068 ( 1.031 default ). It would crash sooner or later. Now I play fully stably with 1.056! No crashes on browsing with HWA, no grey screens... I'm pretty sure, this 12.8 set is gonna be great. I cannot tell you about Crossfire, though.