I have some parts from my old computer and i only need a new hdd so i am planning to build a new computer from those spare parts. My question is, i got an FX-4300 as cpu on a gigabyte 970-Gaming but my psu does have a 6pin cable for additional power supply on the motherboard, can fx 4300 work without additional power from the psu? My power supply: lc-8460btx its about 6 years old.