Increase 80mm Fan RPM

<<Onafets>> · Jan 19, 2009, 11:50 PM

HEy all

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!

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Thx all...Happy NEw YeAr!

Kursah · Jan 20, 2009, 12:04 AM

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?

silkstone · Jan 20, 2009, 12:06 AM

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.

NamesDontMatter · Jan 20, 2009, 12:14 AM

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.

kiriakost · Jan 20, 2009, 12:51 AM

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 ..

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 ..

Meizuman · Apr 22, 2009, 01:51 AM

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?

mlee49 · Apr 22, 2009, 01:57 AM

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.

p_o_s_pc · Apr 22, 2009, 02:49 AM

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)

FordGT90Concept · Apr 22, 2009, 02:53 AM

Best just to buy higher amp fans. They draw more power but move more air (and make more sound).

Jan 19, 2009, 11:50 PM	#1
<<Onafets>> Join Date: Nov 2008 Location: Sydney, Australia Posts: 757 (0.46/day) Thanks: 490 Thanked 77 Times in 73 Posts System Specs	Increase 80mm Fan RPM HEy all 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! \|\|\|\| ====== ====== Thx all...Happy NEw YeAr! __________________ “As long as you bypass the quantum septicular rings and interconnect the transmission module 3/4 the way down the flux capacitor you'll do just fine.” -Soylent Joe “Don't go all flash. Your website would be a resource hog, slow down people's browsers and kill little baby seals.” -xbonez

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Jan 20, 2009, 12:04 AM	#2
Kursah Eligible for custom title Join Date: Oct 2006 Location: Missoula, Montana, USA Posts: 6,558 (2.72/day) Thanks: 727 Thanked 1,349 Times in 1,118 Posts System Specs	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? __________________ Overclocking is Easy! Get Results! - GTX 260/280 Unofficial Support Thread TPU's Gaming Headphone/Headset Thread - Share your experience - My Heat -

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Jan 20, 2009, 12:06 AM	#3
silkstone Join Date: Nov 2008 Location: HCM Vietnam Posts: 2,180 (1.31/day) Thanks: 323 Thanked 344 Times in 287 Posts System Specs	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. __________________ Thanks to BradleyKZN for polishing my sig “oooooooooooh fire!!! and girls...GIRLS and fire!!!!!!! oooooooooooooh runz around clapping hands together” -Marineborn

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Jan 20, 2009, 12:14 AM	#4
NamesDontMatter Join Date: Oct 2005 Location: Connecticut, United States Posts: 758 (0.27/day) Thanks: 12 Thanked 27 Times in 19 Posts System Specs	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.

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Jan 20, 2009, 12:51 AM	#5
kiriakost Join Date: Dec 2008 Location: Volos, Greece Posts: 848 (0.53/day) Thanks: 30 Thanked 72 Times in 65 Posts System Specs	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 .. 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 ..

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Apr 22, 2009, 01:51 AM	#6
Meizuman Join Date: Nov 2008 Location: Finland (northern) Posts: 619 (0.37/day) Thanks: 92 Thanked 89 Times in 54 Posts System Specs	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? __________________ CPU-Z validation sig pics temporarily blocked

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Apr 22, 2009, 01:57 AM	#7
mlee49 Eligible for custom title Join Date: Dec 2007 Location: KU Posts: 6,921 (3.51/day) Thanks: 1,598 Thanked 2,048 Times in 1,602 Posts System Specs	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. __________________ Heatware: Mlee49 115-0

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Apr 22, 2009, 02:49 AM	#8
p_o_s_pc F@H&WCG addict Join Date: May 2007 Location: Newark ohio Posts: 9,916 (4.48/day) Thanks: 3,158 Thanked 2,215 Times in 1,685 Posts System Specs	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) __________________ crunching for TPU on 30 CPU Threads + 688 Cuda cores More to come

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Apr 22, 2009, 02:53 AM	#9
FordGT90Concept "I go fast!1!11!1!" Join Date: Oct 2008 Location: IA, USA Posts: 10,575 (6.29/day) Thanks: 1,755 Thanked 2,596 Times in 1,960 Posts System Specs	Best just to buy higher amp fans. They draw more power but move more air (and make more sound). __________________ Golden Rule of Programming: Never assume. try { SteamDownload(); } catch (Steamception ex) { RageQuit(); }

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