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Help with MB fans connectors and other little doubts

post #1 of 20
Thread Starter 
Hi guys

I have a GA-Z87X-OC Force MB and the MB has a lot of PWM fans connectors

Today `ll change the radiators fans, but when i bought this machine it was not me that mounted it

So i have a question here, as you can see in the image manual i uploaded there is a cpu fan and a cpu opt_fan one near each other:

l25s.jpg

Should i connect the both radiators fans in this connectors?

If yes why the OPT fan when i monitor spins very slow compared to the cpu fan one and when i run a prime or a IBT it starts to run almost as equal as the cpu fan one?

Another question:

At bios i have all the option to set all the PWM fans or to auto / manual / quiet / full speed , i saw a huge difference at prime and IBT temps setting the fans at bios tor run at full speed from the beggining instead set to normal, even with the normal option enabling the PWM on and getting the same RPM as the full speed when i stress the PC, why this happen? Should i let all full speed, just opt full speed, just cpu full speed or let as it came and leave all normal and let PWM works itself?

Hope you understand my doubts, my english is not so good

Thanks guys
post #2 of 20
I have a setup with two radiators, with 8 fans each on them and I did hook them up to the CPU and the CPU_OPT header on my motherboard. It's working fine for me, but If I leave them on auto management, the rad-fans on the CPU header do spin up more than the other one. I'd guess this is just normal behavior, even though I suspected that CPU and CPU_OPT are in someway treated the same way by the motherboard but apparently not.

It really depends on what you want your fans to do. If you don't care too much and the auto setting works fine, then leave it. If you want more control over them, I'd suggest you get yourself some software that is able to deliever more options like various profiles to manually set your fans when the cpu / gpu reaches a given temp. I myself use the Asus AI Suite since I have an Asus motherboard; you'd have to check what Gigabyte has in store for their customers. Otherwise, there is one universal program that might be able to give you a good amount of control: SpeedFan

It was suggested to me before I knew about the AI Suite, but I haven't tested it myself.
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post #3 of 20
Thread Starter 
Quote:
Originally Posted by Valice View Post

I have a setup with two radiators, with 8 fans each on them and I did hook them up to the CPU and the CPU_OPT header on my motherboard. It's working fine for me, but If I leave them on auto management, the rad-fans on the CPU header do spin up more than the other one. I'd guess this is just normal behavior, even though I suspected that CPU and CPU_OPT are in someway treated the same way by the motherboard but apparently not.

It really depends on what you want your fans to do. If you don't care too much and the auto setting works fine, then leave it. If you want more control over them, I'd suggest you get yourself some software that is able to deliever more options like various profiles to manually set your fans when the cpu / gpu reaches a given temp. I myself use the Asus AI Suite since I have an Asus motherboard; you'd have to check what Gigabyte has in store for their customers. Otherwise, there is one universal program that might be able to give you a good amount of control: SpeedFan

It was suggested to me before I knew about the AI Suite, but I haven't tested it myself.

Gigabyte has a software called Easy Tune, i think it give this option for me, just don't know if it's for all pwm fans or just the cpu one, will check later

So, the connection is right? One fan at Cpu fan connector and the other one at Opt_fan as both uses pwm right?

Thanks


Sent from my iPad using Tapatalk HD
post #4 of 20
Quote:
Originally Posted by wsarahan View Post

Gigabyte has a software called Easy Tune, i think it give this option for me, just don't know if it's for all pwm fans or just the cpu one, will check later

So, the connection is right? One fan at Cpu fan connector and the other one at Opt_fan as both uses pwm right?

Thanks


Sent from my iPad using Tapatalk HD

Yes, it's right - at least in my opinion. As long as you use pwm headers, you're fine with whichever you use. Good luck with the software!
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post #5 of 20
Thread Starter 
Quote:
Originally Posted by Valice View Post

Quote:
Originally Posted by wsarahan View Post

Gigabyte has a software called Easy Tune, i think it give this option for me, just don't know if it's for all pwm fans or just the cpu one, will check later

So, the connection is right? One fan at Cpu fan connector and the other one at Opt_fan as both uses pwm right?

Thanks


Sent from my iPad using Tapatalk HD

Yes, it's right - at least in my opinion. As long as you use pwm headers, you're fine with whichever you use. Good luck with the software!

Thanks man

I was worried about the opt_fan just really get the RPM when the PC was extressed like prime or IBT, otherwise it stays at 700/800 rpm and goes to 1500+, and the cpu_fan was always with a nice RPM since the boot, but as you said and will wait for more comments should be normal

Let's see if my new radiators fans that will arrive today give me some better cooling, 4770k not delided even with the cosmos 2 and the gelid extreme is very but very hot, hotter than my old ivy bridge 3770k, haswells was a step back in terms of temps frown.gif

And talking about the bios, if i set all the pwm fans to full speed at bios the noise extreme high, almost impossible to stay at the PC, but at least it makes the rig much more colder smile.gif, i'll wait more feedbacks untill Fedex arrives here but i'll thy the softwares you said and let the bios control pwm at auto, at least if someone else convience me to do something else smile.gif

Thanks again


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post #6 of 20
My advice would be to get a very good quality fan controller and hook all the fans up. You'd have complete control of the cooling performance and noise levels. The wiring is also easier without having to worry about Motherboard headers.
I have the Akasa 6 channel FC with up to 20 fans connected to it. Each channel can supply 20 watts of power and I can turn off fans completely so the rig is quieter when programming or browsing the web.
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post #7 of 20
Thread Starter 
Quote:
Originally Posted by BradleyW View Post

My advice would be to get a very good quality fan controller and hook all the fans up. You'd have complete control of the cooling performance and noise levels. The wiring is also easier without having to worry about Motherboard headers.
I have the Akasa 6 channel FC with up to 20 fans connected to it. Each channel can supply 20 watts of power and I can turn off fans completely so the rig is quieter when programming or browsing the web.

Would be nice but it's not an option, at least for now frown.gif

But is it normal that the cpu_fan spins about 1500 rpm all the time even being PWM one like i've posted my MB manual image here and the opt_fan only spins at 600/800 rpm and just shows the force when needed like a stress test getting the same 1500 rpm fan as cpu_fan loads by default? Is it really right? Even both supossed to be PWM connector as the MB manual says?


Thanks again


Sent from my iPad using Tapatalk HD
post #8 of 20
Thread Starter 
Sorry guys it was my mistake

It is not running 100% all the time just checked here

It runs with 1100 rpm when idle and the OPT runs 900 RPM when idle, if i put some stress test both goes to the limit, almost 1600 RPM, this using the default settings, but as you said i can make my own cooler curve with the Gigabyte EasyTune app, so everything is ok right?

Another question:

In the rear of my case i had the Corsair 140mm quiet Edition and it runs very slow, but it was a 140 mm fan but i have here a GentleTyphoon 120mm D1225C12B5AP-15 that fits my cosmos 2 without any problem and runs at 1850RPM at 12V (3pins) is more deal to use the Gentle one 1850RPM 120mm or the Corsair 140mm 1100 RPM?

But even with the GentleTyphoon it`s not running at 1850, it stays at 1790/ 1800/1750 RPM when monitoring by software, is it normal?

Thanks again
post #9 of 20
Quote:
Originally Posted by wsarahan View Post

Sorry guys it was my mistake

It is not running 100% all the time just checked here

It runs with 1100 rpm when idle and the OPT runs 900 RPM when idle, if i put some stress test both goes to the limit, almost 1600 RPM, this using the default settings, but as you said i can make my own cooler curve with the Gigabyte EasyTune app, so everything is ok right?

Another question:

In the rear of my case i had the Corsair 140mm quiet Edition and it runs very slow, but it was a 140 mm fan but i have here a GentleTyphoon 120mm D1225C12B5AP-15 that fits my cosmos 2 without any problem and runs at 1850RPM at 12V (3pins) is more deal to use the Gentle one 1850RPM 120mm or the Corsair 140mm 1100 RPM?

But even with the GentleTyphoon it`s not running at 1850, it stays at 1790/ 1800/1750 RPM when monitoring by software, is it normal?

Thanks again

I'm also using a Corsair AF140mm Quiet Edition fan as rear exhaust in my case and I too noticed that it almost always runs at around 700rpm. Not an issue for me so far, since my case temp rarely ever goes above 30° Celsius. But if I were you, I'd stick with the 140mm and would not replace it with the GT. Why? The GT is a static pressure fan, good for radiators but not for pushing high amounts of air. For example, the Corsair AF140mm (AF stands for AirFlow - there are also the 'SP' series which stand for Static Pressure) has a CFM (cubic feet [of air] per minute) of 67.8 whereas the GT has 57.7

And If you're thinking, the GT isnt' much worse, you have to take into consideration that these are the MAX amounts, so in order to reach them, the AF140 will only spin up to it's max rpm at ~1100 while the GT will be sitting at a much noisier ~1800.

As for the GT not running at 1850 and only close to it, this is absolutely normal. From the fan specs, you can always +/- 10% to its stated rpm. For instance, my Corsair SP120 HP fans that I use on the rads have a stated RPM of 2350 but even at configured full speed don't ever go above 2250.
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post #10 of 20
Quote:
Originally Posted by wsarahan View Post

Would be nice but it's not an option, at least for now frown.gif

But is it normal that the cpu_fan spins about 1500 rpm all the time even being PWM one like i've posted my MB manual image here and the opt_fan only spins at 600/800 rpm and just shows the force when needed like a stress test getting the same 1500 rpm fan as cpu_fan loads by default? Is it really right? Even both supossed to be PWM connector as the MB manual says?


Thanks again


Sent from my iPad using Tapatalk HD

The motherboard pics seem to say that only the CPU fan header is a true PWM fan header and all the others, CPU OPT, SYS fan headers are voltage controlled headers. Not true PWM headers.
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