I actually have that power supply.. in a haf X full tower. it depends how 'neat' you want to be with your cable management.
I'm OCD, everything has to be hidden/zip tied. So i had to buy extensions for the CPU socket power, and the motherboard 24pin power. Then i was able to run them up behind the motherboard tray. they were like $7 each from amazon or something.
Otherwise you will have to run the CPU power overtop of your gpus, and it actually might not make it there at all, so you might HAVE to get extensions to even reach the socket power.
I had just enough on all my other cables to neatly hide them and still get where they needed to go.