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PSU Fan on the way out?

post #1 of 4
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I've got an Antec Toughpower blue 750W psu, and for the last couple of months, I have noticed a slight oscilating ticking noise. After turning down all the various fans in my rig it didn't seem to be any of them. Then when I started mining, noticed it came back a lot stronger, so wondering whether its the PSU fan bearing going?

The fan is a PWM unit, so as the PSU is out of warranty, could i replace it with any decent PWM fan? Images from a review below:

http://www.kitguru.net/wp-content/uploads/2010/06/P1020806.jpg

http://www.kitguru.net/wp-content/uploads/2010/06/P1020773.jpg

Any help would be much appreciated WJ9
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post #2 of 4
    Yes, but not with any decent fan.  You will need to match the fan voltage for sure (12V).  It would also be good to get a fan with a similar power consumption rating (0.37A or 370mA or 4.44W).  A higher power fan would be needlessly noisy, and lower power fan may not cool adequately.  You will also need to make sure that the new fan's pinout matches the existing fan's pinout.  Red and black must match.  You can usually trial-and-error with the other pins (white usually being RPM out, and blue usually being PWM in).  The pins can usually be reconfigured by releasing them with a very small straight screwdriver.

    Another possibility is simply to take the sticker off the back of this fan (do save it somewhere) and put some engine oil into the bearing that is behind it.  Sometimes there is a rubber pad that you'll also have to remove.  This has worked very well for me.  Don't use any of the "3-in-1" oils though, as they tend to gum up after a while. thumb.gif
 
Edited by Techie007 - 9/22/13 at 9:45am
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post #3 of 4
Agreed with the above, but to add to what was said...

I would use only a dual ball bearing fan as a replacement, they're the most proven reliable bearing type. HDB/FDB are supposed to be reliable but have some quirks that DBB doesn't.

If you want to try re-oiling the current fan, I have had a near perfect success rate using either Redline or Royal Purple as they're true Synthetic oils (not like most Mobile One, Castrol, etc that are Group 3), being Group 5 and 4 respectively. Since I have crates of the stuff for my BMW engines, and use 5W40 in my race motor to great success, that's what I've used and it seems perfect. I have 80mm and 90/92mm fans from 2003 that still run perfectly thanks to this, in fact they run quieter than they did new...
   
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post #4 of 4
Ticking isn't from a bearing. Ticking is caused by either a wire slightly touching the fan blade or, more often, a thrust washer. The latter can often be fixed by unplugging the AC power cord from the power supply (IMPORTANT -- do not simply turn off the power switch -- remove the power cord!) and then pulling or pushing on 2 fan blades opposite one another. If you use bent paperclips or wire to pull on the fan blades, be sure they can't fall into the PSU.

Ordinary light 5-10 weight oil is fine, whether natural or synthetic, but don't use silicone lube or WD-40. I don't know if sewing machine oil is OK, but it's actually vegetable oil (easier to wash out of clothing).
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