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Increase 80mm Fan RPM

Nov 8, 2008
779 (0.23/day)
Sydney, Australia
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HEy all:cool:
I wan wondering how to OC the rpm on the fans in my PC.
They are little IDE extention fans which means there is ide in and then ide out with the fan cable comin out the middle. Can you. Lol i'm just full of questions aren't i! :laugh:
Thx all...Happy NEw YeAr! :wtf:


Staff member
Oct 15, 2006
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Are you talking 4-Pin Molex power connectors? As I've yet to see a IDE Cable powered fan lol! I think that's what you mean tho, the 4 pin molex connectors are the primary power connection on IDE devices.

You can't really "OC" fans...max in your rig will be 12V unless you purchase a seperate fan controller capable of greater than 12v and that your fan is capable of handelling the higher voltage...especially if you plan on extended use. There are fans out there that are rated for 24+v, but noise, vibration and power consumption all rise with higher airflow.

How many fans do you have in your case? Are they all 80mm?

Nov 1, 2008
3,626 (1.09/day)
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Yup, you need to up the voltage. but you can't really do that with a computer psu unless you want to do some re-wiring.
Oct 1, 2005
796 (0.18/day)
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Aside form all that the noise would be absolutely unberable. I can't even get myself to buy or build with 80mm fans anymore, it just dosent make sense.


New Member
Dec 24, 2008
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I would suggest TT smart fans , they regulate rpm with included knob or temperature sensor, and are capable to do high rpm.

There is only one problem , they cost .. :laugh:

I have two 92mm 4800 rpm .

The first works on the CPU cooler with the temperature sensor , at low rpm most of the times, the point is that its unstoppable for four years.

The second stays as spare .. :D
Nov 8, 2008
626 (0.19/day)
Finland (northern)
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Lets say I have a 120mm low RPM fan, but I want more RPM from it... Is there a way to mod the PCB/components or is the RPM determented by unchancheable (or say, "too hard to come up with high" rpm alternative) components?
Dec 27, 2007
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The RPM is set by the fan motor itself and how much Voltage is applied. Theoretically one could do a mod to supply/overvolt the fan and have it run at a higher RPM.

I've seen a step down from 12V->7V->5V but not a step up. My guess is a as good as Google's.


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May 2, 2007
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alittle googleing and i have found that the only was is to use a separate PSU for just the fans that can put out more then 12v (eg meanwell PSUs)


"I go fast!1!11!1!"
Oct 13, 2008
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Best just to buy higher amp fans. They draw more power but move more air (and make more sound).