Bought Asus Z97-AR/4670k with 16gb of ram, been using asus p6td deluxe i7-950 for a long time. I ran the i7-950 at 3.2 ghz never a issue at all. Main reason for upgrade was the faster SATA on the Z97 (or I hope so) From what little I read on the I5-4670 seems about the same as the I7-950 speed wise. One more thing my PSU is getting old but never a issue as of yet it is a PC Power & Cooling 750w. Looks like they went belly up or sold out. That PSU should have no problem with the new board/cpu ?