Fans won't work

D

do9105

New Member
So to make a long story short I wanted to replace my CPU fan. I don't know what came over me to do so.. But I "did it". Anyways heres the problem: I went to best buy to buy a new cpu fan and i guess you cant buy a fan under 80mm there. So I ended up buying a $30 rocketfish cpu fan/ heatsink combo. It's definitelly better than my stock fan and heatsink. When I went home and installed it I went to turn the computer on and for about 5 seconds the fan will spin and then it will stop and every few seconds it will twitch a little bit acting like its trying to spin.. Then I will get an error message that says CPU fan failing computer turning off.. or something to that effect. So I found a little work around if I manually spun the fan with my finger while booting up it would work. I ended up just laying an old fan on top of the heatsink while plugged in and thats been working pretty good. But the fan is supposed to have High, Medium, and Low settings. But when this fan is set to medium and low it does the same thing as the first fan. But when I turn it on High the fan only spins at the speed it should on low.. I have no idea what the problem is but I'd like to fix it.

One thing about the first fan is that it has 4 pins.. the red, black, white, and blue one. I've read about what the blue one is for, but I don't have a plugin on my motherboard for the 4th pin (the blue one). So I just plugged it in so the red white and blue were plugged in.

Any ideas? I realize that was a lot of reading.. So I'm sure something in there isn't going to make sense. Just let me know and I'll clarify.. haha. Thanks for your helppp...
 
Sounds to me like the fan is broke. Plug it up to another computer if possible. If it works on that computer then it is your computer. If it doesn't work then it is the fan so just return it a get another one.
 
do9105 said:
So to make a long story short I wanted to replace my CPU fan. I don't know what came over me to do so.. But I "did it". Anyways heres the problem: I went to best buy to buy a new cpu fan and i guess you cant buy a fan under 80mm there. So I ended up buying a $30 rocketfish cpu fan/ heatsink combo. It's definitelly better than my stock fan and heatsink. When I went home and installed it I went to turn the computer on and for about 5 seconds the fan will spin and then it will stop and every few seconds it will twitch a little bit acting like its trying to spin.. Then I will get an error message that says CPU fan failing computer turning off.. or something to that effect. So I found a little work around if I manually spun the fan with my finger while booting up it would work. I ended up just laying an old fan on top of the heatsink while plugged in and thats been working pretty good. But the fan is supposed to have High, Medium, and Low settings. But when this fan is set to medium and low it does the same thing as the first fan. But when I turn it on High the fan only spins at the speed it should on low.. I have no idea what the problem is but I'd like to fix it.

One thing about the first fan is that it has 4 pins.. the red, black, white, and blue one. I've read about what the blue one is for, but I don't have a plugin on my motherboard for the 4th pin (the blue one). So I just plugged it in so the red white and blue were plugged in.

Any ideas? I realize that was a lot of reading.. So I'm sure something in there isn't going to make sense. Just let me know and I'll clarify.. haha. Thanks for your helppp...
Click to expand...


Sounds like you bought the wrong fan.:confused:
 
no.. I'm pretty sure the fan should work. I just wont be able to plug in the tachometer part of the fan (i think?)
 
Check your power saving modes. To me it almost sounds like it's trying to run at a low voltage setting.

And I'm quite sure 3-pin fans work on 4-pin connectors.

For 4-pin there is GND, +12V, RPM, CONTROL
For 3-pin there is GND, +12V, RPM
 
Do you have other fans drawning power from motherboard fan headers? If so try switching some of them to either a fan controller or a 4-pin molex.
 
Snip the wires and stuff them into the holes on the molex connection or buy a converter.

Also, have you tried using other headers on the board?
 
I figured out that my motherboard just sucks and cant power the fans very well. i figured this out when I used a wall plug in that was used to charge something and I cut off the charger part and I connected the wires to the red and black wires of the fan. It worked. Very loud. So I've come to the conclusion that my motherboard just can't power the fans.
 
Huh... Do you have all the power connectors plugged into the motherboard? I'm thinking I once removed one of the additional plugs to the motherboard and it all worked but the CPU fan wouldn't spin/set off an alarm.
 
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