Asus fan not working

By marinkvasina
Aug 25, 2012
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  1. It's been a year since I built my current pc. I got an Thermaltake Contac 29 CPU Cooler (http://www.thermaltakeusa.com/Product.aspx?C=1417&ID=1906) and I've added an Asus Silent (standard size ) fan on the other side, blue color (can't seem to find it online).
    So recently due to the LED lights from my case, I've noticed some weird coloring on my wall.
    I've opened up my case to see the Asus fan not spining. It's trying to spin like moving back and forward a bit. I also hear like a small beep now when starting up which wasn't there before.
    If I use my finger and just push the fan a bit, it starts working but not a full speed (from eye perspective).

    What could be causing this and how do I fix it?
  2. EXCellR8

    EXCellR8 The Conservative Posts: 2,278

    If you have any other available case/chassis_fan headers on the motherboard, you can try a different connector. Or, you can use an adapter and give the fan power directly from the PSU. Some fans need more juice than the header can provide so you may need to change how it's hooked up. Also, Antec makes good stuff but some of their fans are quite cheap. If you can't get it to work after changing changing the power source you might want to find a replacement.

    There is also a chance that the BIOS is limiting the fan's speed but if that were the case I would think it would at least start spinning on its own... might be worth to check though.
  3. marinkvasina

    marinkvasina TechSpot Enthusiast Topic Starter Posts: 253   +8

    Eh Antec? It's Asus, and yea it said Silent fan but it's the loudest fan in my case, but that's a different matter.
    The thing is that it used to work, and suddenly it trys to start spining but like moves a bit back and forth non stop. Pushing it a bit makes it start spining at around 850-860 RPM which is a weird speed for a standard fan, untill I start working around in the MSI Control Center and it's working around 1200RPM.

    I will definently try this even though I don't think that it's going to work.
  4. EXCellR8

    EXCellR8 The Conservative Posts: 2,278

    Ah my mistake, but I believe Antec makes the ASUS fans anyway, but I could be wrong. If the fan used to work and now it doesn't, it may just need to be cleaned out. If it's been a year or so, depending on how clean the air is, there could be some build up of dust or pet hair. There's really only the one moving part on the fans so if there's something making it struggle removing it will fix it.

    If you find that this is the case, I recommend after cleaning it to use a fan filter. This will help keep the blades and hub cleaner.
  5. marinkvasina

    marinkvasina TechSpot Enthusiast Topic Starter Posts: 253   +8

    It's been cleaned a bit 2months ago or less.
    I've opened up my case just a bit (going out so don't have time).

    The weird sounds were from the Case standard fan whose rpm dropped by 50%(from 1600 to around 800) , it was like that for a few minutes. Now it's back to normal.
    What could be causing this?
  6. EXCellR8

    EXCellR8 The Conservative Posts: 2,278

    The motherboard BIOS may be changing the speed automatically depending on the temperature inside the case. There are sensors that monitor this and in turn adjust the speed accordingly. This is why you may want to set the speeds manually in BIOS or download a fan controller to use on your desktop after startup.
  7. marinkvasina

    marinkvasina TechSpot Enthusiast Topic Starter Posts: 253   +8

    No the temperature seemed normal when this happened. Like I said I've heard strange noises which might be why it has happened.
    Might this be my PSU (don't even wanna show you what I did with it), since it's affecting 2 fans now? (Note: Since I got back everything is normal for now, haven't restarted yet)
  8. hood6558

    hood6558 TechSpot Booster Posts: 288   +43

    When I have any doubts at all about a fan I'll replace it, it's cheap insurance. None of them last more than 2 or 3 years (except Deltas and a couple other industrial grade fans), and the usual "name brand" crappy fan is lucky to last 6 months. I would feel stupid if I let a $10 fan wipe out my $1500 system. I am a bit of a fanatic about temps and airflow. If you have multiple case & CPU fans, one can fail without frying the system, you'll soon notice the dead fan (because of the elevated temps) and fix it. There's a total of 9 120mm fans in my system, if you count the 2 on the H100 radiator, but with good fan control, it's cool and quiet until you really stress it, and even then it's not bad.


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