Well I have an older Phenom II 965 oced to 4.073 with a 7970 with 6 extra fans, case lights, sound card 2 HDDs 1 SSD, 5.1 surround. Due to the software for my UPS i can enter teh exact price per Kilowatt hour and it does the math for me depending on use. My system is not as energy efficient as your is.