hey there, i just spent the last few days trying to figure out this NVCC since i could not find anything explaining how to use it correctly. Well i have worked out how to use it and just wanted to let anyone else know how to if there wanting to unlock cores on a Nvidia chipset. First boot up into bios settings and enter into NVCC(under M.I.T on gigabyte boards) then set it to "Per Core" dont use the Auto setting. Reboot and go back into youre bois settings and enter NVCC again now disable core 3(you only want to test one "locked" core at a time). Reboot, let it load into windows and stress the CPU(prime95, intelburn test, orthos, etc), If it fails the test or locks up go back into bios and set core 2 in NVCC to -2% and retest, if it fails try -4% and so on upto -12%. If it still fails at -12% the core is too damaged to run and should remain locked. Repeat all steps on core 3 with core 2 disabled while testing(even if it passed) You may need to step up the chipset voltage +.1v to get it to run NVCC succesfully(higher than stock voltages can damage hardware so do it at youre own risk). Doing this testing i have been able to get my 555BE 3 hours prime95 stable at 3.8GHz X3 with 1.425Vcore, +.1v on the chipset and core 3 set to -8% in NVCC, i had it running at -4% with 1.456Vcore but saw no performance increase so i settled for the lower voltage at -8%.