fan acts funny

This is a discussion about fan acts funny in the Windows Hardware category; ok i have one 120mm fan hooked up and it starts running normal then dies down then go to normal and it does this over and over

Windows Hardware 9627 This topic was started by ,


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614 Posts
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ok i have one 120mm fan hooked up and it starts running normal then dies down then go to normal and it does this over and over

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Sep 23
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237 Posts
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Hooked up to motherboard header? If so, temperature controlled?
 
Ed

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68 Posts
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You know the most humorous thing about computers is that a majority of the time there is a hardware problem it can be attributed to fans - the simplest working part of a computer. Who would have thought that we could come so far, put millions of transistors on a square inch, and everything comes crashing down without the almighty fan.

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614 Posts
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OP
It's hooked up through the power that the harddrive is

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1778 Posts
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might want to get a higher rated power supply.

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437 Posts
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well, my 2c...
Have you tried another fan ? Sounds like a bad electrical connection somewhere. If its hooked up to a molex connector it should just run. I wouldn't start buy buying a new PSU to see if the fan is OK but the other way around.

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1778 Posts
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you gotta think, if you got a hard drive, cdrom, floppy, mobo, AMD cpu, cpu fan, geforce2mx card and other things running off of it, it's gonna drain a 250w-350w PSU kinda quick, the reason it seems like it slows down is because of hard disk/cdrom activity pulling power from the PSU and taking it away from the fan, i had this problem when i only had one 300w PSU, after i added a second 250w one it stopped.

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148 Posts
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Does its spinning up and down coincide with the activity of the machine, such as a power drain, or is it making a rubbing sound like a bad bearing?