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My cpu fan is running at 7800rpm when the factory high says 6500, my cpu temperature is around 100F, so it shouldnt be going that fast. It connects directly to my power supply, how can i slow it down to reduce the noise? (it screams a high pitched sound)
i've heard of putting a resistor in line with the fan but you'd need to get the specifics elsewhere. try extremetech oc workshop anandtech tomshardware etc for lots of info
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What are you using to monitor your fan speed? With Motherboard Monitor 5 you can get many different readouts depending on your choice of “fan type” and “fan divider”. Maybe your settings are off?
100 F is 38 C. With all the other posts in this forum about CPU temps being too high, I’d put up with the noise.
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Make it 7 volt...
on the molex connector you ave red black black yellowThe fan is connected to yellow and black...
(12v and earth) cafefully romove the black pin from the fan connector and move it over to the other side so when you connect them together black will go into red !!! if you can follow this okif you connect a fan using both live wires i.e red 5v and yellow 12v your fan will run at 7v ( dont ask how i dont understand it )
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Ian, the difference between +12v and +5v is +7v.
If you hook it up backwards, your fan will not spin. If you have an Athlon, your CPU will die a thermal death very quickly. If you have an Intel CPU, your CPU will die a more expensive death slightly less quickly, or maybe not at all because it may shut down internally.
If you have any stay fan wires in your Molex connector you may short 12 and/or 5 to ground. You may ruin your PSU. It will be very exciting.
If either of these things happens, you will wish you’d never done this. You will wish you had tolerated the noise.
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Ta brian..
i did realise the maths....but i still cant grasp the idea of no earth just 2 lives...dont try and explain m8...me and electrics dont mix ( not in that sense anyway)
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the noise is LOUD, i mean anooyingly loud, i can hear it from across my house. why would a fan designed for 6500rpm be running at 7800+
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you are probably jsut getting a bad reading about the speed. if it is louder than it used to be then there could be something wrong with it (thus the bad reading). You tried a different fan or maybe cleaning it?
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head ovever to step thermo-dynamics.com they
make a fan controller and great heatsink fan combos with the controller they are alittle pricey ,but who else gives you a lifetime warranty ,my tbird 1ghz@1.4 is using thier mid priced unit for a year now my temps run mid 80s to 111 degrees f . 100 to 104 with the fan turned down using mbm5 for temps and voltage
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