Was this a full new install with this mainboard, CPU, and GPU, or was Windows previously used with some other chipset/CPU and/or GPU?
You reference 'power usage' but are you possibly referring instead to CPU usage in task manager? (where are you getting alleged 'high power' reads from?)
If you select Balanced mode, and have botched /tinkered with settings that prohibit normal CPU behavior, the CPU should sit at 800-1000 MHz when loafing on the desktop, and scale up nearly instantly to as high as 4.6 GHz briefly for single threaded tasks, and to about 4.2 GHz across all cores for heavily threaded loads, such as gaming, rendering, etc..
Is your monitor connected to one of your GPU's outputs (DVI, HDMI, or DIsplay Port)?