Hi I have a thermaltake TR2 RX 850 watts (win7 64bits) I have this power supply because I have 40tb raid0, that is like 8 hard disks inside, also I have a graphic card shaphire 2gb. But I believe each hard disk consume 50 watts, that is 400 watts + the graphic card My question is about power consumtion, I am paying a big bill of power every month in my house and my computer is ON 16 hours at day becaise I work here all day and part of the night My question is, this power supply is consuming 850 wats per hour always? or consume only the hardware connected, even if I turn off all hard disks (they are only backup so they can be OFF), the consumption will be less or this has nothing to do with that Thanks in advance