250W PSU + NMB fan... Fried?

PSUs: The source of DC power for all components in the PC & often a big noise source.

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250W PSU + NMB fan... Fried?

Post by Politik » Tue Mar 11, 2003 11:40 am

Anyone know if the 18CFM 80mm NMB fan can be safely used in a PSU?

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Post by shunx » Sun Mar 16, 2003 11:40 pm

I've fried a generic 300w PSU with one 80mm NMB at 5v before, so now I use 2 NMBs at 7v+ to be safe.

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It all depends...

Post by NeilBlanchard » Mon Mar 17, 2003 6:51 am


It all depends on how hot the PSU gets! A relatively efficient 250watt PSU could be fine, but a low efficiency PSU with small heat sinks might not. I would go with a "seat of the pants" guess: compare the air flows of the stock fan w/ the NMB and also estimate the temperture of the exhaust air, and see how you *think* it will do. You could always try the stock fan at lower voltages (unless it already has a variable control circuit) or you could run the NMB at 7volts.

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Post by IceFire » Mon Mar 17, 2003 7:38 am

I have one run 12V on a generic PS w/o any problem. Of coarse it is winter here and my computer room is around 60F. I have DVD, CD-RW, floppy, 2 hdd, P-III 750 OC to 823, 1 80 NMB exhaust @ 7v(?), and a cheap cpu fan @ 7v.

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