I was attempting to see if I can unlock the 4th core of my 720 and found the ACC on my Gigabyte GA-MA790FXT-UD5P. Under that i can see Core 0-3, 4 cores or so I think? But when im back in my computer it still registers just the 3 cores on CPU-Z. Would my MB be able to detect the 4th core (as Core 3 I assume) if it were defective? also I don't see any "unlock" options in the MB. ACC just lets me change a % modifier. Also what is that modifier? its like from +0% to +12% to -4%. I guess what I'm looking for is a way to know for sure if I can or cannot unlock that 4th core and how I can be sure of that.