Abuse of power
I purchased a new power supply recently because my old one seemed to be letting me down. I bought an EVGA 750W G3, only to discover that it was consuming 30W of electric when it was not connected to the computer and was just plugged into the mains.
As it was a modular PSU I took all the leads out and switched on the rocker switch at the rear, which was using 30W. Thinking it was faulty, I contacted EVGA who said that in that configuration, it should use nothing, and that if it was connected to the computer and in standby mode it should use between 1W and 5W.
So I returned it and bought an EVGA 650W P2, which to my amazement was using 20W when not connected. I then made some checks and tested several computers, including different people’s, and another PSU, and found that they all used between 20W and 28W.
Why are there not any warnings that these items will consume electricity when they’re shut down and that you should make sure you switch them off at the mains? I’m sure this could be a fire risk. Graham Johnson
PCs shouldn’t draw a lot of power when turned off. Measuring a test PC here, we found that it was using 1.5W when powered off, which seems right to us. How were you measuring the power usage? We use plug-in power monitors here, but there’s a chance that your measuring equipment is throwing up a false reading.