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Windows 7: Upgrading my PC's Memory+Cooling Fans & Cleaning it Out

13 Apr 2016   #11
Ophaq

Windows 7 64 bit
 
 

Thanks for the input! As far as I know, my board doesn't have any PWM headers. I'm not really sure though as the website doesn't specify nor does this: Gigabyte GA-Z77X-UD3H - Overview, Visual Inspection and Board Features - Intel Z77 Motherboard Review with Ivy Bridge - ASRock, ASUS, Gigabyte, and MSI

I watched a tutorial on how to use speedfan but I just wasn't sure if speedfan would recognize the fans on my motherboard unless they were plugged in certain headers or something.

I guess I will have to do an open-case trial and error test but that will prove difficult with the side panel fan. But that's only if I can't get the fans the way I want them.


My System SpecsSystem Spec
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13 Apr 2016   #12
ignatzatsonic

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit
 
 

Look at your own board.

The 3 pin fan headers are NOT PWM.

The CPU fan header is almost certainly 4 pin PWM. If you had 2 PWM fans, you could run both off this header via a splitter.

It looks to me like you will have only 1 PWM fan--the Noctua. It should work in non-PWM mode on a 3 pin header, but it's kinda pointless to buy it for a 3 pin header. You are paying for PWM and then not using that capability.
My System SpecsSystem Spec
13 Apr 2016   #13
Ophaq

Windows 7 64 bit
 
 

Alrighty, so the Noctua PWM fan comes with a PWM splitter. I will change the P12 which is non-PWM for a PWM version like this:
Noctua NF-P12 PWM 120mm Two Speed 1300/900 RPM SSO2 Bearing - Newegg.com

That way, both PWM fans will be on the splitter together where the CPU fan header is at. Another peculiar thing that I want to mention is that if you look at the motherboard picture, you will see that all of the headers have 4 pins. Does this mean all of them are PWM? If so, then perhaps I should replace all of my fans with PWM fans. Also, do you think that my H60 is already connected into my CPU header? I read somewhere that that's what is how the power for it is controlled.
My System SpecsSystem Spec
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13 Apr 2016   #14
ignatzatsonic

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit
 
 

I have no idea how your H60 is connected. You'd have to look.

I would NOT assume that all 4 pin headers do in fact deliver PWM functionality to a PWM fan. Trial and error will tell you.
My System SpecsSystem Spec
13 Apr 2016   #15
Ophaq

Windows 7 64 bit
 
 

Oh, I see. But on the safe side, perhaps I should get all PWM fans anyway? I googled about 4 pin headers and read that any 4 pin header is PWM but that may be wrong. I know that my CPU fan header is PWM from what it looks like in SpeedFan but I'm unsure about the others. There's no data I can find on my specific motherboard that tells me whether or not the rest are PWM.
My System SpecsSystem Spec
13 Apr 2016   #16
ignatzatsonic

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit
 
 

Quote   Quote: Originally Posted by Ophaq View Post
Oh, I see. But on the safe side, perhaps I should get all PWM fans anyway? I googled about 4 pin headers and read that any 4 pin header is PWM but that may be wrong. I know that my CPU fan header is PWM from what it looks like in SpeedFan but I'm unsure about the others.
All you can do is pound google and see if you can get a review of your specific board by a reliable source that addresses the PWM headers question completely.

You'll never know otherwise, other than by trial and error. There are too many instances of 4 pin headers NOT supplying PWM functionality, despite what you may read.

It would be very rare for ALL fan headers to be PWM--not to be confused with 4 pin.

It's certainly premature to go all PWM fans without that knowledge.

Even if you KNEW that all headers were PWM, there's still little reason to go all PWM fans.

The attraction of PWM fans is that they spin slower when the PC is loafing, thereby making less noise. When load comes, they spin faster.

There's no need for PWM at all if you don't much care about the noise level. Particularly when the BIOS gives you some degree of fan control on 3 pin fans.

"PWM" by itself certainly doesn't mean you are getting a high-quality reliable fan.
My System SpecsSystem Spec
13 Apr 2016   #17
derekimo

Microsoft Community Contributor Award Recipient

 
 

If you want to believe this,

Quote:
Pulse-width modulation[edit]
Pulse-width modulation (PWM) is a common method of controlling computer fans. A PWM-capable fan is usually connected to a 4-pin connector (pinout: Ground, +12 V, sense, control). The sense pin is used to relay the rotation speed of the fan and the control pin is an open-drain or open-collector output, which requires a pull-up to 5 V or 3.3 V in the fan. Unlike linear voltage regulation, where the fan voltage is proportional to the speed, the fan is driven with a constant supply voltage; the speed control is performed by the fan based on the control signal.

The control signal is a square wave operating at 25 kHz, with the duty cycle determining the fan speed. Typically a fan can be driven between about 30% and 100% of the rated fan speed, using a signal with up to 100% duty cycle. The exact speed behavior (linear, off until a threshold value, or a minimum speed until a threshold) at low control levels is manufacturer dependent.[7]

Many motherboards feature firmware and software that regulates these fans based on processor and computer case temperatures.
https://en.wikipedia.org/wiki/Comput...dth_modulation

And compare it to your manual,

Upgrading my PC's Memory+Cooling Fans & Cleaning it Out-2016-04-13_20h58_30.png

Three of those headers fit the criteria.


My System SpecsSystem Spec
13 Apr 2016   #18
Ophaq

Windows 7 64 bit
 
 

Oh... OK. XD
Well, even if they aren't all PWM, I decided I will use all PWM fans anyway just to be on the safe side unless I find out sometime tomorrow through the internet that they aren't all PWM headers.

I found this 140mm PWM fan by Noctua which looked better than my Corsair so I decided it would probably be more worth it anyway to get it. Noctua NF-A14 PWM 140mm Case Fan - Newegg.com

I also decided on getting 3 of these instead of the Corsair ones as like the 140mm ones, I read they were hard to install and these actually get better airflow. COUGAR CF-V12HPB Vortex Hydro-Dynamic-Bearing (Fluid) 300,000 Hours 12CM Silent Cooling Fan with Pulse Width Modulation (Black) - Newegg.com

The 4 pin fans will also match the 4 pin headers so there's that too... which isn't really a big deal or anything. XD
One main reason why I'm hoping all the headers are PWM is exactly as you explained it: "They spin slower when the PC is loafing, thereby making less noise. When load comes, they spin faster."

I would like to have my fans automatically adjusted to the necessary fan speed for the right temperatures. SpeedFan works with PWM fans as well so if I needed to further modify the speeds for higher or slower then that's great. The silence factor from it is a nice bonus I certainly don't mind at all either. Maybe it would motivate me to actually leave my PC on all night for testing things instead of hearing a grinding noise like my current fans that makes me want to turn it off lol.

EDIT:
@Derekimo thank you for the information! I may be a bit dull (or just too tired) to understand the full brunt of the information you posted but does it mean that 3/4 of my motherboard headers are PWM compatible? If so, then the above still applies then. Which header(s) # aren't compatible if the others are?
My System SpecsSystem Spec
13 Apr 2016   #19
ignatzatsonic

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit
 
 

see comments in bold

Quote   Quote: Originally Posted by Ophaq View Post
Oh... OK. XD
Well, even if they aren't all PWM, I decided I will use all PWM fans anyway just to be on the safe side unless I find out sometime tomorrow through the internet that they aren't all PWM headers.

You just found out from Derekimo's examination of your manual that not all are PWM.

sysfan 1 and sysfan 4 are NOT.


The others SHOULD be PWM, according to the manual.


BUT BUT BUT---it's possibly that Gigabyte has done a fouled up implementation of PWM on your board and that you can't trust the manual.

I have heard of some complaints about Gigabyte's PWM implementation and fan control generally.

I have no idea if the complaints apply to your board.

What would I do?

I'd build the thing with a minimal number of fans--say one good Noctua PWM and one or two good non-PWM 3 pins.

Then evaluate it for heat, noise, and fan speed for a few days or weeks and then possibly revisit this and purchase more fans only if necessary. Evaluate Speedfan during this period also. You may find it hopeless.

I would NOT buy 50 dollars plus of fans on RANK SPECULATION that I might need them---unless you are a fan collector who gets a big enjoy from having a bunch of unused fans in a drawer.





My System SpecsSystem Spec
13 Apr 2016   #20
Ophaq

Windows 7 64 bit
 
 

"Three of those headers fit the criteria." - Doesn't this mean that 3 out of 4 of the headers are PWM ready then? I compared it to the manual (and as I was searching for the page I randomly opened it up and there it was), and the information he posted matched it.
My System SpecsSystem Spec
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 Upgrading my PC's Memory+Cooling Fans & Cleaning it Out




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