Introduction: Use Nvidia GPU Fan As a 4pin PMW Fan(and More)

Picture of Use Nvidia GPU Fan As a 4pin PMW Fan(and More)

Just in case some one else wanted to know how to do this.

Step 1: Taking Apart the GPU (EVGA 650 TI Boost)

Picture of Taking Apart the GPU (EVGA 650 TI Boost)

take out all the screws, if you happen to have a 650 ti boost then i have them highlighted for you.

Step 2: Pint Out and Testing

Picture of Pint Out and Testing

this tells you what the pins are, for testing i recommend using a 9v battery, if you mess up its low undervolted and low amprege. if you screw up you are much less likely to fry your fan. remember ground is always on the outside and +12v is next to ground. that means if your not sure there only 2 choices.

Step 3: Running As 4pin PMW Fan

Picture of Running As 4pin PMW Fan

this is fairly straight forward, i also have seen if you use it on 3 pin it dose not like to run with the rmp line connected

proof of it working: (8% speed tested minimum 100% maximum)

that's allot of added speed range.

Step 4: Running As Basic 2 Speed Fan

Picture of Running As Basic 2 Speed Fan

if you can run it up to an 9v battry then you can do this. if you want it to switch between the speeds you can fallow the simple schematic. you could also put a resistor inline with it to drop the speed, or a variable resistor to control he speed. (running like this your maximum speed is lower and your minimum speed is higher so you have less range.) and you could find a dead cdrom drive hard drive to get the connector for you power supply.


Xixfas (author)2016-02-03

Usually you can use software to control GPU fan speeds, if you couldn't there would be no point in having the PWM in the first place.

RockeyDA made it! (author)Xixfas2016-02-08

well at that point your probably using the gpu cooler on the gpu, im using the cooler like this.

the fan speed is pmw controlled by further away cpu.

total cooling budget 40$ temps in 50's fan quiet.

its to help you use what you have.

nneo16 (author)2015-04-02

can ajust the speed if connect to the pin on mainboard ?

seamster (author)2014-11-11

This is a great tutorial. Thanks for posting this!

RockeyDA (author)seamster2014-11-18

yeah, i could not find a pin out on it so i made to use trial and error to find the pins, i origonaly did this to help some one out on a forum but then i was like, hay,i should share this with the world.

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Bio: Good enough aint good enough, if i look at something long enough i end up trying to figure out how to make it better. I ... More »
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