In the process of selecting quality components, to build a ninja system, and have shortlisted either one of the 2 big Tagan PSU's as the ones of choice. This is mainly down to the fact that I want steady and trustworthy juice flowing through the veins of the system, as it will be either X fired / SLi'ed, and will also have 4 hard drives. My question is - with over a KW on demand, do these PSU's only consume the amount of wattage that they are asked to provide, or do they consume their rated capacity, whether the system is idle or not. With todays electricity prices, and with the amount my PC is on (a lot!), it would be worrying if the system was to consume the equivalent of 10 x 100w bulbs all the time it was powered up. Thanks Jez.