http://www.hanselman.com/blog/PowerCfgTheHiddenEnergyAndBatteryToolForWindowsYoureNotUsing.aspx
There’s been a lot of talk about power and energy usage by PCs lately, especially ones on battery. I use an irresponsibly power hungry desktop at home, an Ivy Bridge Intel Lenovo X1 Carbon Touch for work, a Surface 2 (for email, remote desktop (RDP), videos, games and airplane stuff since I don’t sweat its batter) and I’m also testing this prototype Haswell that Intel sent me. Whatever machine I get next to replace the X1 Carbon Touch (likely a Yoga 2 Pro) will be a Haswell, and ideally it will support “Connected Standby.” Connected Standby is a low-power state that lasts for tens (or hundreds) of hours, but allows the PC to play music, refresh email, and receive VOIP calls. Haswell is amazing, to be clear, but it’s all the components working together – chipset, wifi adapter, processor – that make for a truly compelling machine.