I have an AMD APU (A6-4400M) and sometimes performance decreases when TurboCore increases Voltage/Clock speed. I use AMD Overdrive to manage Voltage and CPU Speed cause my fan gets crazy when reaching 3.2 Ghz at 3.1250 V (50°C - 70°C on heavy tasks)
I changed the APU Speed to 3.0 Ghz and voltage to 1.1750 and now works much better even after applying changes. Why do this happens? Isn't it supposed that TurboCore chooses the best performance setting for my CPU? After applying changes (Not closing anything I had open when TurboCore do it's job) performance increases a lot, even multitasking freezing decreases a lot. I actually did it because of the fan getting crazy but never thought this would increase my speed.
From what I know, lower voltage mean less activity and I know sometimes overclocking CPU causes bad performance but I haven't done anything, it was automatically done by the APU, but with a low voltage and a good clock speed everything seems to work even better. Fan is slow, temperature is low, and multitasking performance is much better. Why do this happens? I know that there may be APU's GPU performance issues but I'm not gamer, I haven't tested games in this CPU voltage/clock state.