two 3pin case fans connected to 4pin on motherboard syst_fan?

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keno51

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I want to control the fan speeds of my two 3pin case fans which is why I'm opting to connect it to the mobo's syst_fan port which is 4pin.

My motherboard is GA-B150M-DS3H, not to be confused with the ddr3 version which will come up first in google searches.

Advice on how to allow for the two case fans to be controlled via the motherboard would be greatly appreciated, if a wire is suggested, a wire of 30-43cm would be highly suggested due to the two fans in the case being opposite sides of the system.

My case fans are that of the Deepcool TESSERACT SW ATX Mid Tower Case (included).

Thanks to anyone who took the time to overlook this thread.
 
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JackNaylorPE

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The number of pins in a MoBo header is meaningless. It does not definitively tell you whether the header is PWM or DCV. Your MoBo manual should but even this is not 100% reliable. All Asus Z87 manuals said the 4 pin SYS / CHA were. PWM but they were not. The dual function PWM / DCV headers were planned for Z87 but weren't quite debugged so they went with DCV

Best PWM Option - if the headers are determined to be PWM only, then I'd recommend the Phanteks fan hub which takes a PWM signal and runs up to 11 system fans. Your MoBo header will typically handle 1 amp which is equivalent to about 6 3-pin 140 mm, 1250 rpm fans

http://www.newegg.com/Product/Product.aspx?Item=N82E16811984004

Best DCV Option - If your system headers are dual function (PWM / DVC ... check your manual) or DCV then you can still use the Phanteks hub above. or, you can go cheaper and use a hub from modmytoys. Yiu may have to manually select DCV in the BIOS

http://www.frozencpu.com/products/14661/ele-987/3-Pin_Power_Distribution_PCB_3xWay_Block_MMT-PCB-3WAY.html?tl=c121s424b214

These are much less messy (wire clutter) and more reliable than fan splitter cables





 
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keno51

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thanks for responding jack, I'm going to be honest and say i have no idea what you're speaking of lol. this is my first build and i just don't want the fans to be running at 100% when their is no need for them to be.

i only need it to connect two 3pin 120mm case fans by the simplest way possible in order for it to not be blasting at 100% for opening a tab.

thanks for taking the time to answer my question. I'm planning to do it by wires because the fans are of 30-40cm apart from each other and i'm unsure of the own fan wire lengths. i don't mind clutter as i can hide most behind the little panel meant for hiding it.

 
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JackNaylorPE

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1. Using the fan hub, the fans will be controlled by the MoBo fan headers and the MoBo utility or BIOS fan control scheme you implement.

2. This couldn't be any simpler ... ever use one of these ?

12-228-276-TS


Same thing... you plug the power strip into a wall outlet which brings 6 outlets 6 feet closer to you. And now you can plug 6 things in with much shorter cables. Fan hub is no different. The cable from MoBo to hub puts your 2 fans that much closer to a power source

a) Run cable from Mobo Header => Hub Input
b) Attach Fan No. 1 cable => Hub Output
c) Attach Fan No. 2 cable => Hub Output
d) Set fan curve in BIOS or w/ MoBo utility for the MoBo Header you used

3. The hub provides for greater length and flexibility. If the fans are 40cm apart, then you locate the hub between them. Now you only two fans w/ 20cm cables. That's < 8 inches.

http://www.phanteks.com/assets/manuals/PH-PWHUB.pdf
 
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keno51

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I apologize if I come off as not the brightest but it takes quiet a bit of time for me to get my head around something especially when it comes to learning pc parts I never thought of.

I'll run through the steps to see if we're on the same page if that's okay.
A)plug it in to the syst_fan 4 pin port on the motherboard
B/C)attach both fans to 3 pin ports on the part you linked
D) so I have to set the fan speed myself and won't be regulated by the motherboard for what it needs?
3) the hub between them is somewhere in the middle, and the space between the motherboard and front one is in the ballpark of something around 30cm by the looks. so it's guna be difficult to estimate the correct place but I guess trial and error haha.

4) If it's recognized by the mobo, does that mean that there is free software of some kind which isn't sketchy that can control the fan speed so I wouldn't have to manually tamper with it?
 
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JackNaylorPE

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1. Fan cables are typically 15-18" long ... I don't see a problem. The Phanteks comes with the Header cable... modmytoys doesn't, you'll have to buy one. Bit none of this can even be thought about until you know what kind of header you have.

2. What you have by the way of control depends on what you bought .... more directly, you get what you pay for. Buy a $300 board, even a $125 board and you will have more tools than you need. But a $59 board and you must expect to get less. Again, read your MoBo manual to see what control you have. Typically, there will BIOS control (rather simple) or more fine control with a utility. This is a pretty lame tutorial since he never goes into "Advanced Control"

https://www.youtube.com/watch?v=9TU-Ew719Ro

This is a bit better but bit out of date ... and his fan speeds aren't changing no matter what the settings

https://www.youtube.com/watch?v=DPArz4Fn7Qs

http://www.gigabyte.com/products/product-page.aspx?pid=5640#utility
 
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keno51

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http://uk.pcpartpicker.com/list/7H6LPs this is my parts list and if it doesn't show up correctly please tell me (anything labeled as £0.00 is a possible upgrade in the future which is the SSD and fan)

I have yet to purchase this build and this is the only thing in my way at this time which is why I don't have a motherboard manual to see the control I have. I'm uncertain if their is any manual online for this exact motherboard GA-B150M-DS3H as their website does not entail this from what I've seen.

By any chance since the motherboard will recognize that they're their, could a program such as msi or speedfan be used? or is the direct connection the motherboard and those programs their only outlet?

Thanks again for taking the time to respond.
 
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JackNaylorPE

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1. Recognize that the MoBo has Realtek ALC887 audio solution ... standard for gaming boards is ALC 1150. But this a price often paid when budget restricted.

2. The SSD doesn't do squat for anything on the HD (im other words, most of your games). Id upgrade to a SSHD which is twice as fast as the blue and 50% faster than the Black
http://uk.pcpartpicker.com/product/ftPfrH/seagate-internal-hard-drive-st1000dx001

 
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keno51

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1)I'm already very close to my budget which is £720 due to the cost of win 10 being £100, if you know of a motherboard which would supports the things I need then I'd be happy to hear it but my budget is quiet tight atm and would require other parts to be changed which would be a hassle (not like this isn't already haha).

2) The ssd was going to be something I'd buy in the future, my budget is quiet tight with £720 being the budget and already been £9 over it isn't helpful but can be covered for.

3) thanks for realizing that I wouldn't of as I don't even know what the audio solution is.

4) Guessing speedfan/msi wouldn't work for the fans then?
 
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JackNaylorPE

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1. Any changes are more money. This is the lowest priced board we recommend.
http://uk.pcpartpicker.com/product/8q38TW/gigabyte-motherboard-gaz170xpsli

2. Yes, with or w/o the SSD, that is a painfully slow HD. With the SSD, you won't even miss the SSD but can always add later.

4. Speedfan is just about useless these days.... I only go to speedfan if the MoBo doesn't have it's own utility and all boards discussed do.
 
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keno51

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1)The only thing purchased atm is the graphics card which I picked up for £255 so I'd still have around £465 including the £100 for the os

2) how slow? I don't mind load times but if it's going to be the cause of screen tearing or things of that kind then I guess I won't have a choice.

3) I thought the mobo I have atm didn't have good utillity, would the mobo I have be capable of automatically changing the speeds for what the computer needs by this utility like the kinds of msi/speedfan would?

4) could I just buy an external fan manager which could automatically adjust if what I'm asking is not possible?
 
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JackNaylorPE

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2. Since you have no SSD, you are looking at longer boot times whereas SSD boots in 15.6 seconds, SSHD is a hair behind at 16.5 secs. In gaming:

http://www.tomshardware.com/charts/hdd-charts-2013/-17-PCMark-7-Gaming,2915.html

1st place versus 3rd from last.... it's even 50% faster than the Black

3. Don't know what this speedfan /MSI reference is. Please look at the previous post with links demonstrating Gigabyte's fan control utility. Given the existence of this utility, not sure why speedfan is still in the discussion. Speedfan is a substitute... a poor substitute for the MoBo manufacturer provided utilities when the board does not come with one. read your manual and get familiar with what it comes with before looking for alternatives.

4. An external fan controller a) costs money and b) provides manual control. Again, **if** a MoBo comes with it's own fan control utility, this is the "best of all available options". I gave you the link to your MoBo to the utilities offered fior your board and some samples of demo videos. Look at these to see whether it does what you want to do. Again, download your MoBo manual (link above" and get the info "from the horse's mouth" so to speak".
 
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keno51

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2) I don't care about boot times as I'd happily go get snacks or a bottle of water whilst I wait.
But the gaming part is the important part to me and since I don't have the money atm I'll just have to go with the WD caviar blue and then at a later date (maybe around christmas get the HDSSD hydrid you suggested due to budget constraints. Then I'd not only have a backup but also something for extra storage if I decide so.

4)All I want it to do is regulate the fans speeds so It's not blasting 100% when I'm just surfing youtube
4a)that's the only thing I want as everything else can be upgraded at a later date but this function needs to be in place before I can do anything.
 
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JackNaylorPE

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I don't know how many different ways to answer the same question.

All you need to know about controlling fan speeds is contained in the previous posts ... it does require some effort on your part. To understand what it does, you will have t0 read the manuals and watch the videos. The links clearly show you how to set a certain fan speed for a certain CPU temp. You just need to read the manual to see what version of the utility you will receive
 
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keno51

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How can I find out if it's pwm or dcv. I don't have the manual. Once I know this I can purchase one of your option links you posted.
Then I can go into the mobo's utility and can an automate it somehow so I don't have them running at 100% for tasks outside of extreme gaming pushing my pc.

That's my understanding and if you can respond to each question, then all my questions should be answered on this specific problem. Other problems will arise such as configuring it but focusing on this main issue right now and here so we can end the loop would be best.
 
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keno51

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Wow how I didn't see the manual download is beyond me, I've been there dozen of times.

As long as the 3 pin connectors can be recognized by the board and controlled via the software, I should be fine.

i should of taken a look over the information again before tangling myself up in info.
thanks tradesman.

and i apologize for wasting your time answering the same questions JackNaylorPE
 
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keno51

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Finding out whether the fans are guna be recognized and controllable is the next challenge now lol.

Thanks again.
 
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keno51

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fan speed percentage is showing pwm and not dcv, does that mean I can control it?
 
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keno51

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I apparently have three syst_fans could I just connect the 3pin fans to them and control them? below is the syst_fan operation showing what each pin does. Not sure if this helps in any way, this is just really confusing me as I've never dealt with fans or pin kinds.

SYS_FAN1/2/3:
Pin No. Definition
1 GND
2 +12V/Speed Control
3 Sense
4 VCC

I've just found this and was curious as the connector suggested seems to just be like an extension cord in a way.

Thanks for taking the time to respond.
 
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