How to make 12cm case fan run at full speed?

angry_goat · 07-08-2008, 04:10 PM

Hi I was wondering if there's some way to make a molex-connector 12cm case fan run at max speed? i've heard it can be done by cutting some of the wires on it but can't seem to find a proper guide, and apparantly they don't run at their full voltage by default.

For anyone who recommends speedfan or some other application (or changing BIOS even) it doesn't work with those :s (not being a 3-pin connector)

Any help would be appreciated :P

**TheMatt** · 07-08-2008, 08:51 PM

As long as any fan gets its power from the 12V (yellow wire) part of the molex connector it will run at full speed. Almost all computer fans accept a maximum voltage of 12V.

Unless there is a resistor/potentiometer somewhere in the fan wiring, it shouldn't be running slower than full speed.

**forcifer** · 07-12-2008, 01:09 AM

actually, some fans are designed to run at 9v or even 6v, so that they conserve energy and noise. i have seen a guide, and i will see if i can find it again...

**stressfreesoul** · 07-12-2008, 06:09 AM

Surely though, if the 120mm fan was designed to be a low RPM fan, wouldn't it just be prudent to buy a full speed 120mm example? They dont cost much...

Tumbleweed36 · 07-12-2008, 11:22 AM

Here is even another solution (and I know you aren't asking for another fan) for the future. Just buy one of those Antec 3 speed fans (tricool) with the little switch that permits you to change the speed and hook it up directly to the power supply instead of going through a motherboard or power supply "sensor" connector. That is how I do all of mine and I can run them the way I want to and change them when needed.

magnethead · 07-12-2008, 08:53 PM

Quote:

Originally Posted by Tumbleweed36

Here is even another solution (and I know you aren't asking for another fan) for the future. Just buy one of those Antec 3 speed fans (tricool) with the little switch that permits you to change the speed and hook it up directly to the power supply instead of going through a motherboard or power supply "sensor" connector. That is how I do all of mine and I can run them the way I want to and change them when needed.

beat me to it

Tumbleweed36 · 07-13-2008, 06:41 PM

Aha, got you this time...well, I know that might not happen twice, so I will enjoy this one anyhow.

magnethead · 07-13-2008, 07:03 PM

oughta just put in our sigs "Looking at case fans? check the tri-cool's" lol

we're spoiled with our fancy cases :p

07-08-2008, 04:10 PM	#1 (permalink)
angry_goat Registered User Join Date: Jul 2008 Posts: 2 OS: Win XP 64bit	How to make 12cm case fan run at full speed? Hi I was wondering if there's some way to make a molex-connector 12cm case fan run at max speed? i've heard it can be done by cutting some of the wires on it but can't seem to find a proper guide, and apparantly they don't run at their full voltage by default. For anyone who recommends speedfan or some other application (or changing BIOS even) it doesn't work with those :s (not being a 3-pin connector) Any help would be appreciated :P

07-08-2008, 08:51 PM	#2 (permalink)
TheMatt Moderator, Hardware Team Join Date: May 2006 Location: Boston Posts: 13,695 OS: Win 3.1, 98, NT 4.0, XP Debian 4.0, Kubuntu 6.06 My System Blog Entries: 3	Re: How to make 12cm case fan run at full speed? As long as any fan gets its power from the 12V (yellow wire) part of the molex connector it will run at full speed. Almost all computer fans accept a maximum voltage of 12V. Unless there is a resistor/potentiometer somewhere in the fan wiring, it shouldn't be running slower than full speed. __________________ - Matt M - KB1OSC - Folding@Home 85015 If TSF has helped you, please consider donating. If I have stopped responding to a thread, feel free to send me a PM with a link to the thread. It is advisable to subscribe to threads so you will receive updates when replies are posted. You can subscribe to threads from the "Thread Tools" Menu. »Memtest86 »Prime95 »UBCD »SpeedFan »NHC Personal »Everest »Sandra »PC Wizard »RivaTuner »ATi Tool Click here for Useful Articles and Guides

07-12-2008, 01:09 AM	#3 (permalink)
forcifer good bye and good luck Join Date: Nov 2005 Location: Kansas City kansas Posts: 3,486 OS: Vista Premium 32 My System Blog Entries: 1	Re: How to make 12cm case fan run at full speed? actually, some fans are designed to run at 9v or even 6v, so that they conserve energy and noise. i have seen a guide, and i will see if i can find it again... __________________ im back...i guess...

07-12-2008, 06:09 AM	#4 (permalink)
stressfreesoul Inspector Gadget... Join Date: Mar 2008 Location: Yorkshire/County Durham Posts: 1,283 OS: XP My System Blog Entries: 7	Re: How to make 12cm case fan run at full speed? Surely though, if the 120mm fan was designed to be a low RPM fan, wouldn't it just be prudent to buy a full speed 120mm example? They dont cost much... __________________ Finish the project. We'll buy you a new family.

07-12-2008, 11:22 AM	#5 (permalink)
Tumbleweed36 Asst Manager Hardware Join Date: May 2005 Location: USA Posts: 14,190 OS: XP Professional	Re: How to make 12cm case fan run at full speed? Here is even another solution (and I know you aren't asking for another fan) for the future. Just buy one of those Antec 3 speed fans (tricool) with the little switch that permits you to change the speed and hook it up directly to the power supply instead of going through a motherboard or power supply "sensor" connector. That is how I do all of mine and I can run them the way I want to and change them when needed. __________________ ----------

07-13-2008, 06:41 PM	#7 (permalink)
Tumbleweed36 Asst Manager Hardware Join Date: May 2005 Location: USA Posts: 14,190 OS: XP Professional	Re: How to make 12cm case fan run at full speed? Aha, got you this time...well, I know that might not happen twice, so I will enjoy this one anyhow. __________________ ----------

07-13-2008, 07:03 PM	#8 (permalink)
magnethead Tech Hardware Team Join Date: Mar 2006 Location: TX Posts: 2,129 OS: XPH, 2K My System Blog Entries: 2	Re: How to make 12cm case fan run at full speed? oughta just put in our sigs "Looking at case fans? check the tri-cool's" lol we're spoiled with our fancy cases :p __________________ For proper support: what are you running? video card, cpu, m/board, ram, power supply, brand, wattage, any error message? PCI-E requires 26 amps at 12 volts. That's a 650W PSU. Power Supply Info and Selection . Info on thermal compounds & application . TEST PSU USING MULTI-METER