you should be able to get 4.6Ghz on stock cooler on max and and with something like a H100i you should be able to get around 4.8Ghz on that board with 1.296V (1.3V is the max recommended for haswell/haswell refresh) just remember to update your BIOS before you get it as you will need to have support for haswell refresh. you will also be able to overclock your ram to 2400Mhz top if you feel like you need fatser ram