Do PSU fans speed up because of heat or usage?

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MatthewGB

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Jun 15, 2016
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I'm going to be replacing the fan on my Aerocool Integrator 850W PSU (Tier 4 DW), which gets pretty loud under usage; it's the loudest thing in my computer, even after a 300W GPU. Anyway, does it speed up due to temperature, which would be great because then it would work fine with most fans that spin fast enough, or does it change based on how much electricity is being used?
Also, shouldn't there be a subforum for PSUs under Hardware?...
 
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I think I've got my answer; the fan takes a long time to speed up after load is applied, and a long time to slow down when idle, so I think it's probably temperature. I put the new fan in, Arctic F12, which has a higher startup voltage but still works fine, and is far quieter.
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Yamitime

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Sep 4, 2014
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If your using 4 pin fans plugged into motherboard they will spin faster when required (higher temps).
PSu fans usually speed up when required depending on load . They also speed up if they get dusty and heat up a little.
Is the fan blocked in any way ?
 
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feelinfroggy777

feelinfroggy777

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Dec 13, 2016
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I would recommend upgrading your PSU altogether before trying to replace the fan. You really get what you pay for with a PSU and using a sub par product can damage the other components in your PC. I would suggest a product from EVGA, Corsair, or Seasonic. You will not be able to hear the PSU fan over your GPU.

This is a new EVGA PSU that I have heard good things about.

http://www.microcenter.com/product/470790/SuperNOVA_G3_750_Watt_ATX_Power_Supply
 
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MatthewGB

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I'm talking about the fan that's IN the PSU; so it's connected by a 2pin connector and the PSU controls the fan speed using voltage, not PWM. If I connected it to the motherboard that would be bad idea since the mobo has no idea what temperature the PSU is.
The fan is intentionally blocked by a thin plastic film so the air is directed over the whole PSU circuit board. It's slightly dusty, but it's loud because of a crappy bearing that makes a little ticking noise every revolution.

And throwing £80 at the problem to get a more efficient and better quality PSU is not an option (Unless you want to pay :p). Replacing the crappy fan with an Arctic F12 could be a good option assuming that the PSU will change speed based on temperature and not usage, as the new fan probably doesn't respond to the same voltages with the same amount of airflow.
 
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aquielisunari

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There is no way I can answer that. There is not any information about how it cools. Is it constantly at 100%? IDK. Have you looked for a phone number for them? Reviews? Not too favorable. It's my belief http://hecgroupusa.com/contact/ is responsible for that brand. Try those numbers to figure out an answer to your question and both of the US numbers aren't working.

With that being said I wouldn't modify your PSU. It would seem to stand to reason that with a such a bargain basement model there wouldn't be anything too fancy, which leads me to believe it's always at 100%. Hence your noise complaint. You aren't going to find the sleek and sexy Noctua fan blade design that reduces noise or anything close to that in that PSU.

I built my rig. I am financially challenged. As such I went for an inexpensive PSU which did get an unfavorable review from Johnny Guru. On the same token if one is to look for the EVGA 500W 80+ PSU over at PCpartpicker or amazon or newegg they would see good reviews. I think it was about $40. I can contact the maker of every part of my PC including the case. Should I have any questions I don't want to take 10 minutes hunting down a wild goose. I call EVGA and ask what I need to know. SImple. Your PSU maker? Not simple.
 
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Yamitime

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Yeah sorry i misread the initial post .I thought you meant system fans.
 
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MatthewGB

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I've sent an email to HEC, they will probably respond with "Don't open your PSU" anyway. As for the PSU, mine is about the same quality, if not better, as the EVGA White ones, which is the one I assume you got. I got mine for 35£ second-hand. The PSU at maximum load is about 70%.
 
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aquielisunari

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Sure, they can say that but they should be able to answer your question about how it cools. What you do with that information isn't any of their concern. Unless you offered them that extraneous info in which case you voluntarily voided your warranty.
 
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MatthewGB

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I think I've got my answer; the fan takes a long time to speed up after load is applied, and a long time to slow down when idle, so I think it's probably temperature. I put the new fan in, Arctic F12, which has a higher startup voltage but still works fine, and is far quieter.
 
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