@RetiredChief: the command gives me file not found
i dont have it on, but when i click on Start->Shutdown->Sleep it goes down, even truecrypt unmounts the volumes but i dont have itself hibernation on. So question is if it goes to sleep, where is the content of ram written to?
Sleep is not Hibernate.
Sleep suspends the current session to RAM, so if you computer loses power, you lose that session (and anything running that hasn't been saved).
Hibernation suspends the session to your hard drive or SSD, and if you lose power you still boot up into that session when you turn your PC back on.
Suspend consumes a little more power than turning your PC off, but I have measured my own computer with a Kill-A-Watt to still be consuming under 5-7W of power while in sleep, while completely off my PC still consumes around 1W.