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Help, all the fan pins for MSI Z87 G45 are 4 pins and all fans are 3 pins

post #1 of 9
Thread Starter 
I do not get what the heck is going on here. It is my first build I have ever done, but why the heck are all the pins for fans on the MSI Z87 G45 mobo 4 pins and every fan I have from the Fractal Design case fans down to the Corsair H60 all 3 pins?

This makes no sense at all in my mind, maybe someone can point me how to fix this? I wanted to have nice cables and even have sleeved fans, but so much for making things look nice, it seems I need some kind of connector to make all the 3 pins 4?

If anyone can tell me how to fix this (a link of some connector) and even better how I can fix this and not have a crap looking inside that would be great! I am now wishing I never got this mobo. mad.gif
    
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post #2 of 9
The 3 pin connector is keyed on 1 side for a plastic tab. The motherboard has 4 pins but the plastic tab is offset. Simply plug the cable so the tab on mb fits cable
post #3 of 9
The 3 pin fans are compatible with the 4 pin connectors... There are 4 pins not necessarily in this order but PWM, RPM, 12+, and 12-.

Your 3 pin fans do not have PWM so the speed is controlled by changing the voltage that is supplied to them. Where as with PWM you can either use a PWM signal that (from my understanding) turns the fan on and off in pulses to regulate the speed. Which allows you to have a wider range of RPM control because the fan always operates at 12v where as normal fans will eventually stop turning if enough voltage isn't supplied and they wont start if enough voltage to start them isn't supplied (which isn't a problem with motherboards because they monitor the RPM anyways).

Also less heat with PWM on the fan controller and you can supply the 12v from a molex connector since the PWM is the only thing used to control the speed. PWM fans can be controlled the old fashion way as well or a mixture of both as in maybe running a PWM fan at 7v and then controlling the duty with PWM.
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post #4 of 9
Thread Starter 
ahhhh TYYYYY so I can plug in all my fans, call me crazy, but with my logical mind this made 0 sense lol

So I know this is not the place, BUT on my 24 pin for the mobo connector from psu there is an extra 4 on my power supply cable and the extra 4 on my mobo, so I do fill those all in though right to fill all the power holes on the mobo? USe the full amount of slots? Might sound dumb, but all this break up of cables is making me kinda crazy, my mind is just too black/white for this crap.
    
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post #5 of 9
Quote:
Originally Posted by ann72 View Post

ahhhh TYYYYY so I can plug in all my fans, call me crazy, but with my logical mind this made 0 sense lol

So I know this is not the place, BUT on my 24 pin for the mobo connector from psu there is an extra 4 on my power supply cable and the extra 4 on my mobo, so I do fill those all in though right to fill all the power holes on the mobo? USe the full amount of slots? Might sound dumb, but all this break up of cables is making me kinda crazy, my mind is just too black/white for this crap.

Yes... some Micro-ATX boards and maybe other boards too use a 20pin motherboard plug. So some power supplies have the extra 4 pins on a separate plug. The plug should be designed to kind of pair up with the other plug...

I don't think you can accidentally do this but just make sure you don't plug a 4-pin CPU connector into that spot or that plug into a 4 or 8 pin CPU spot.
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post #6 of 9
Quote:
Originally Posted by givmedew View Post

Yes... some Micro-ATX boards and maybe other boards too use a 20pin motherboard plug. So some power supplies have the extra 4 pins on a separate plug. The plug should be designed to kind of pair up with the other plug...

I don't think you can accidentally do this but just make sure you don't plug a 4-pin CPU connector into that spot or that plug into a 4 or 8 pin CPU spot.

There was a topic of some poor bloke achieving that. Here on OCN.
Fireworks.

@ann72 like givmedew said, the fourth pin is used for pulse width modulation (PWM) which does exactly that - maintains a set duty cycle (ratio between on duration/total duration in %), effectively reducing power supplied to the fan.

@givemedew (Click to show)
'dew' as in mountain dew? tongue.gif
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post #7 of 9
Quote:
Originally Posted by fragamemnon View Post


'dew' as in mountain dew? tongue.gif

Why yes as in mountain dew smile.gif

Back when I was 12 Yrs old and already an established dew drinker and very much into video games and extreme sports I needed a new screen name for my AOL account. The old handle was TheLoneFragger. A lot of people didn't get the fragger part which I didn't know if I spelled right so half of my games it was thelonefrager some just the lonefrager because thelonefragger didn't fit. A lot of my friends started calling me the lone fagger either just because they felt like it or had no idea what I was try to get across with fragger. But oh well. Their score vs my score spoke well to the reason they didn't understand what the word frag meant.

So I needed something different and it needed to be balanced visually and the same amount of letters on each side of whatever was in the middle.

So I made GivMeDew or maybe it was givMEdew I don't... I cared to much but anways 18 years later... it is still my username of choice... and I never see it.

I don't use it for email anymore and infact bailed on it because over the years over and over I have told people that it was G I V M E D E W with NO E after GIV and they still put in givemedew and the email never shows up. Make matters worse at some point someone got that username and so then the people didn't even get a mailerdeamon response saying that there was no email address.


Anyways you asked... you got a super long explanation.
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post #8 of 9
Quote:
Originally Posted by givmedew View Post

Anyways you asked... you got a super long explanation.

Good to read this. I always thought you just spelled 'due' wrong biggrin.gif
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post #9 of 9
Quote:
Originally Posted by WiSK View Post

Quote:
Originally Posted by givmedew View Post

Anyways you asked... you got a super long explanation.

Good to read this. I always thought you just spelled 'due' wrong biggrin.gif

LOL

Nope just spelled the giv wrong but it was on purpose.
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