Kili20

Hello Guys, I bought an i7 6700k to replace the 6400 in my computer. It's a Fujitsu Esprimo D556. So now I have a couple questions... I would like to be able to control the cpu fan with some kind of software, but i couldn't find any. \ Also, to reach higher clock speeds, will I need to flash a custom BIOS, or is there some other way to use the i7's full potential? Kind Regards Kili20