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How to test heat sink fan separately

I

imported_rexian

Member
I am wondering if I can test heat sink fan separately just plugging in the heatsink fan to the PSU without connecting other connectors to the motherboard. I believe, I need to connect at least 4 connectors before turning the PSU on. Because the +5 volt rail needs at least 2 amp load.

Or am I just trolling around? New at this...please help.

Rex
 
Is the fan 3 or 4 pin? If it is thre pins, just plug it into the board and hang on tight... If it is 4-pin, you should be fine polugging it into thew connector, as long as the rest of the PC is hooked up.
 
Well, I see more trouble in this than it's worth. There's a way you can short the 20-pin molex connector so it powers up without being connected to the motherboard, but that's usually only done to test watercooling setups for leaks. Although you can do this to test anything really, you're better off just setting the whole thing up and turning it on. It's safer too.
 
You could test it seperately, as people have mentioned(short the green cable on the motherboard connector block to any of the white ones to power it on, modern power supplies should be ok). However, assuming you put the heatsink on correctly, even a totally dead fan won't kill the processor. Just watch to see if it spins up properly, if not shut down. It might crash every ten minutes, or throttle horribly; but it won't die. I'd pay more attention to getting the heatsink on correctly, that is where mistakes hurt.
 
Here is what has happened...

While fooling around...I connected the HSF to the 4 pin connector. The HSF has a 3 pin tail and so, I connected it via 3 to 4pin connector. While I was reading the manual of the PSU, my son decided to make a go at it.

So, we turned on the PSU back switch. The PSU did not turn on. As I felt a growing pain in my stomach seeing that my $229.00 PSU from PP&C fan is not rotating, I got even more worried if I messed up the PSU completely altogether.

That's why I want to know if its really a peril before I call PP&C. Again thanks a bunch for replying.

- Rex
 
If you turned on the rear switch, while the PSU was not connected to anything but an HSF, normal behavior would be to do nothing. If, however, you shorted the green line to ground(any black line) according to the outlines of the "paperclip trick"(ask for it by name on google) and it still did nothing, then you may well have a problem. Alternatively, your rather nice PSU may be designed to only function under proper load. Not hugely likely; but possible.
 
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