that's quad core which supports PCI-E 3.0. well capable of handling 980 Ti SLI without issues although the single core performance for games at 3.6 ghz turbo leaves much to be desired.
and 3470 is not overclockable. you need to get the 3570k and a chipset for overclocking ie z77
so personally i will go with unlocked maxwell / skylake processor if you're spending on a gtx 980 ti