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question for the PSU gurus

Fullmetal Chocobo

Fullmetal Chocobo

Moderator<br>Distributed Computing
Moderator
This is a project that me and my wife are doing. Basically it's just a couple of machines for crunching numbers for DC projects like SETI, DPAD, Folding@Home, etc. This rack is in my garage, and I live in South Texas on the coast. So it gets hot in there. There is no ventilation in the garage, and it isn't possible to add it, because I do not own my own. So I'm trying to cool these barebone machines as much as possible.

I am going to have fans installed on the shelves, so that there is air blowing down on the mobos / parts. Would it benefit the PSUs to have their casings removed? I wasn't sure if they work the same way as PC cases, in that positive pressure works best. Also there is the situation of EMI, which jonnyGURU brought to my attention...

Just considering ideas. Thanks ya'll.
 
Hi, Positive air is not the way to go with anything. Cases work best with about half the fans blowing out and half in. It's moving the room air through the case that does the cooling. Blowing on a device certainly helps that device as long as the room air is moved efficiently. An open rack has the benefit of having the room air moved by natural convection aided by heat from the boards. The PSUs own fan should do a good job on it. Extra fans sure couldn't hurt. Good Luck, Jim
 
I would be concerned about EMI, but if desired, you can replace the cases with modder's mesh. I believe that should block most, if not all, of the EMI.
 
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