EUR204,73
be quiet! Straight Power 11 Gold
be quiet! Straight Power 11 Gold
The power supply unit and therefore also the fan can be tested by bridging two pins on the ATX connector using a paper clip. Just google "pc power supply test paperclip"...
PS. From personal experience, I would advise against buying be quiet power supplies. I've had to replace them twice under warranty in the last 2 years.
I think the fan only turns when it is needed.