I spent the morning moving my computer into my new (second hand) case and as you may know, the PSU lives at the bottom. Having been running for a bit, the main compartment is reasonably cool and neither the case fans nor the CPU fan have spun up much. All in all they are nice and quiet. On the other hand, the fan in my PSU is going like the clappers and is a whole lot noisier than when it was in my old case. I have put it so that the fan is on the bottom where there is a grill and a filter for it to allow it to get air. Based on the fact that it seems to be getting too hot, do you have any suggestions? If I turn it upside down I will have to re-wire the whole case as the wires won't be long enough to get in to the cable routing . I am not keen on removing the dust filter because it is on carpet and will just fill with dust. This seems to leave just propping the case up a bit which doesn't seem like a great solution but it will be what I do for the time being. Any other ideas? Have I done anything wrong? edit: propping it up has helped massively. It very quickly quietened down and is now a lot better.