I currently am running a PhenomII Deneb 2.8quad with 8gb ddr3. With a 6970 and a gigabyte 790 bridge mobo.. I am wanting to upgrade my Cpu, Mobo, and PSU to be more energy efficient, for personal reasons. And I was wondering what would be my best choices. And if I should get a nvidia 670 as well. If it'd be worth it.