When I'm not using my PC, I usually put it in sleep / stand by mode, as this significantly reduces power consumption. Recently I have been reading about hibernate mode, which actually turns off the computer but saves the information in memory, so that it is still available when you turn the computer back on. A difference between hibernate and sleep mode is that it takes longer to turn the computer on again, when it has been in hibernate. Plus, a computer in hibernate mode uses less power than sleep mode. Do you ever use hibernate? Do you find that it has any advantages or disadvantages?