Sign-in / Sign-up
Your question
Solved

Asus Sabertooth 990fx Fan Control

Tags:
  • Asus
  • Sabertooth
  • Motherboards
  • Fan Controller
Last response: in Motherboards
August 13, 2014 11:04:09 PM

Ok so I have this motherboard Asus Sabertooth 990fx and I bought 2x of these fans for my computer case CM 690 : http://www.amazon.com/Cooler-Master-SickleFlow-120-Radi...

The problem is when I look in the Bios, I can see the 2x fans running at 3800 Rpm (which is very fast) and for a second it goes up directly at 19000 Rpm and change back to 3700/3800/3900 very fast (lol?) I don't think it goes at 19000 Rpm because the fans are not that loud..

I plugged the 2x fans (3pins) in Cha Fan 3 and 4, which are 3 pins too. I tried to plug in Cha Fan 1-2 but it the same result
example (not my bios) : http://images.anandtech.com/doci/5714/Sabertooth%20BIOS...

2 questions :
1- Why is the range so weird 3800/19000 Rpm in my bios? is that normal, because it seem to run fine. (it not even going at 5000 Rpm or 7000 or 15000.. it just skip very fast between these 2)
2- Can I plug a Chassis Fan into Cpu Opt (4 pins) on the motherboard (the one close to CPU Fan) is it dangerous ?

Thx in advance. (sry for my english)

Forgot to say temp range is about 30 degrees (at start) 50 degrees (in-game)
my 4 others fans are running between 1000 to 2800 Rpm (normal), all of my fans are Vertically
Coolermaster 1000w power supply
Lastest bios update (v1604)

My thoughts :
Enabling Chassis Q Fan Control (I already tried but it just makes less noises, I think it still doing the same thing, I will try again tommorow)
Enabling Cool'N'quiet (don't seem to do anything, I might be wrong?)
Plug them in my power supply... I don't think the 19000 Rpm is that dangerous for my motherboard... It looks fake :\

More about : asus sabertooth 990fx fan control

a b Ĉ ASUS
a c 92 V Motherboard
August 13, 2014 11:17:48 PM

It's a reading error, basically the speeds must be 1900/3800 although the fan is rated at 2000 RPM. So basically a reading error, at 3800 you'd go pretty much crazy with the noise those fans will make 19000 is going to need you to hold the rig down with chains to the floor....
You can plug the fan into the CPU Opt header, but, it's going to give you even more crazy readings.... plus it might just trigger a shutdown if something goes wrong with the fan which is not actually that important as it's not for the CPU or a Cooler....

m
0
l
August 14, 2014 11:02:51 AM

alyoshka said:
It's a reading error, basically the speeds must be 1900/3800 although the fan is rated at 2000 RPM. So basically a reading error, at 3800 you'd go pretty much crazy with the noise those fans will make 19000 is going to need you to hold the rig down with chains to the floor....
You can plug the fan into the CPU Opt header, but, it's going to give you even more crazy readings.... plus it might just trigger a shutdown if something goes wrong with the fan which is not actually that important as it's not for the CPU or a Cooler....



hmm k thx, If I have a 80 mm Cha Fan plugged into CPU Opt can it be dangerous ? When I power on my computer this Fan is on the fastest speed and makes really big noises, then after about 30-45 seconds it running normal.. I tried to plug it somewhere else but it does the same..
The Fan I'm talking about : http://www.amazon.com/Cooler-Master-Bearing-Computer-Co...

other thing really important which I really don't understand.. when I enable Chassis Q Fan Control / Standard / 600 Rpm my fans are way more quiet and slower, Cha Fan 2 is the only one at about 580 RPM (probably auto-control) and when I'm on Windows/desktop I can see my screen flash with black random lines eh :S what is that over-heating with 6 fans ? I feel like my new graphic card will die :\

HWmonitor
m
0
l
Related resources
a b Ĉ ASUS
a c 92 V Motherboard
August 15, 2014 4:51:08 AM

How are the fans placed and in which way does the air flow? What is the case and what is the GPU? What cooler are you using for the CPU?

The loud noise for sometime could be a cable touching the blades or a free plug/socket, check and re-check ....
If possible we'd like to see pics of the internals....
m
0
l
August 15, 2014 10:34:52 AM

alyoshka said:
How are the fans placed and in which way does the air flow? What is the case and what is the GPU? What cooler are you using for the CPU?

The loud noise for sometime could be a cable touching the blades or a free plug/socket, check and re-check ....
If possible we'd like to see pics of the internals....


All fans are placed in Vertical (heard it was better than horizontal for lifetime) the case is "Coolermaster 690" (CM 690), GPU is MSI GTX 760 TF 2gb gaming.

Front Fan : Flows In
Top Fan : Flows In
Left side 2x fans : Flows Out
Right side fan : Flows In
Back side Fan : Flows Out

No cable is touching anything.. free plug/socket : there is only one 3 pins fan plug connected to a 4 pins (1 free socket).. my case is very clean.

I'm starting to think that the lastest version of my motherboard bios (v1604) is not working well with the Q fans control.. I remember the default version (v0402) was way better..
m
0
l

Best solution

a b Ĉ ASUS
a c 92 V Motherboard
August 15, 2014 11:12:20 PM

First you're going to need to change the flow directions...
Why???
Hot air rises to the top..... you need to go with the flow for optimum fan life, cooling efficiency and less wasting of electricity.
The Top Fan should throw air out of the case....
The Side panel fans ought to pulling in air so as to supply the GPU with fresh cool air to keep it nice and cool....
The front Front intakes are fine.....
and the rear exhaust is fine too...

As far as controlling fans goes,
If you want complete digital control over them, you need to go for PWM Fans (4Pins) and not 3Pin Fans....my 990FX is in a CM Lan Box (HAF XB) and I did get all the Noctua Fans for each and every intake and exhaust inclusive of the small 80 mm ones at the back....
But I made sure they're all PWM fans....
The BIOS is perfect in all senses....
Share
August 16, 2014 7:47:20 AM

alyoshka said:
First you're going to need to change the flow directions...
Why???
Hot air rises to the top..... you need to go with the flow for optimum fan life, cooling efficiency and less wasting of electricity.
The Top Fan should throw air out of the case....
The Side panel fans ought to pulling in air so as to supply the GPU with fresh cool air to keep it nice and cool....
The front Front intakes are fine.....
and the rear exhaust is fine too...

As far as controlling fans goes,
If you want complete digital control over them, you need to go for PWM Fans (4Pins) and not 3Pin Fans....my 990FX is in a CM Lan Box (HAF XB) and I did get all the Noctua Fans for each and every intake and exhaust inclusive of the small 80 mm ones at the back....
But I made sure they're all PWM fans....
The BIOS is perfect in all senses....


well thx for the help, this is weird because the top fan came with the case, I never changed it or anything.. I will probably buy another 4 pins fan for that 4 pins socket, so I get no more of that noise, again thx alot.
m
0
l