Yes, especially at very high resolution in which I guess what you are aiming for because you're building an SLI config. If you're still thinking of building, I'd advise you to get an i7 unlocked/K or extreme/X skylake or wait for the upcoming CPUs. I don't know exactly how much it would bottleneck the SLI config but the higher clock of newer gen, OC capability of unlocked CPUs and newer architecture will definitely benefit you