Jump to content



Photo

Slowing fans when cpu is idle?


  • Please log in to reply
23 replies to this topic

#1 goodbytes

goodbytes

    Just below average Joe

  • Tech Issues Solved: 1
  • Joined: 07-May 04
  • Location: England

Posted 16 October 2013 - 19:22

Is it possible to slow down my case fans when the system is idle? All 3 of them are currently spinning at 1134rpm each and the system isn't even doing anything. I downloaded the CommandCenter app for my MSI main board but the lowest range starts at 40c with fans at 50%.. I've set it to this and they are still spinning at 1134rpm, surely thats not 50%? they are 120mm fans.

 

It's really cool when doing nothing currently sitting between 20-25c so even if 1134rpm is 50% it still seems overkill and could be dropped further?




#2 Mindovermaster

Mindovermaster

    Neowinian Senior

  • Tech Issues Solved: 10
  • Joined: 25-January 07
  • Location: /USA/Wisconsin/
  • OS: Debian Jessie
  • Phone: Samsung Galaxy SIII

Posted 16 October 2013 - 19:27

You try speedfan or setting it in BIOS?



#3 OP goodbytes

goodbytes

    Just below average Joe

  • Tech Issues Solved: 1
  • Joined: 07-May 04
  • Location: England

Posted 17 October 2013 - 07:56

You try speedfan or setting it in BIOS?

 

I downloaded speedfan but didn't really get it, i think i managed to modify the settings but it didn't slow down the fans so i either done it wrong or it's not working.

 

I checked the speed of the fans on manufacturers website and they are in fact running at full speed.. this is telling me something is not right because even at the default setting they should be running at 50% around 500-600rpm?



#4 philcruicks

philcruicks

    Neowinian Senior

  • Tech Issues Solved: 6
  • Joined: 24-February 09
  • Location: Bracknell, UK
  • OS: Win 7
  • Phone: iPhone 5s

Posted 17 October 2013 - 08:41

Check out this guide to Speedfan, may help...else there could be an issue with your system, have you go the latest BIOS updates and the like?

http://www.silentpcreview.com/SpeedFan



#5 OP goodbytes

goodbytes

    Just below average Joe

  • Tech Issues Solved: 1
  • Joined: 07-May 04
  • Location: England

Posted 17 October 2013 - 18:12

I tried speedfan again but still not working, i couldn't even slow them down from the BIOS, i think i've narrowed it down to the case fans being rubbish, they only have 3 pins rather than 4.. the headers on the motherboard have 4 pins, apparently the 4th pin goes some way to allowing software to access the fans?

 

So now i'm in the market for 2 silent 120mm fans, any suggestions?

 

And while we're at it i'm also looking for a low profile cooler for haswell cpu, any suggestions?



#6 vetneufuse

neufuse

    Neowinian Senior

  • Tech Issues Solved: 1
  • Joined: 16-February 04

Posted 17 October 2013 - 18:19

make sure your fan ports support variable speed first... I know on two of my motherboards (MSI and EVGA) there are a few connectors that are fixed speed, but still report RPM and appear to be speed controllable but they aren't... only a few of the connectors support dynamic fan speeds based on temperature on a lot of motherboards



#7 vetneufuse

neufuse

    Neowinian Senior

  • Tech Issues Solved: 1
  • Joined: 16-February 04

Posted 17 October 2013 - 18:21

I tried speedfan again but still not working, i couldn't even slow them down from the BIOS, i think i've narrowed it down to the case fans being rubbish, they only have 3 pins rather than 4..

 

you don't need a 4pin fan to control speed, you need the fan controller on the motherboard to support variable speeds... I have 5 fans in my latest system all 3 pin except for the CPU fan. 3 of the 5 support dynamic speed, the other two are fixed speed fans



#8 Mindovermaster

Mindovermaster

    Neowinian Senior

  • Tech Issues Solved: 10
  • Joined: 25-January 07
  • Location: /USA/Wisconsin/
  • OS: Debian Jessie
  • Phone: Samsung Galaxy SIII

Posted 17 October 2013 - 18:27

Could try a few of these:

 

AK-CBFA05-05_f00.jpg

 

I have a few on my system, works well. It changes the normal 12v to 7v, therefore lower speeds.



#9 OP goodbytes

goodbytes

    Just below average Joe

  • Tech Issues Solved: 1
  • Joined: 07-May 04
  • Location: England

Posted 17 October 2013 - 18:35

Could try a few of these:

 

AK-CBFA05-05_f00.jpg

 

I have a few on my system, works well. It changes the normal 12v to 7v, therefore lower speeds.

 

Thanks, may be use as a last/cheap resort as i'd really like something controllable.

 

you don't need a 4pin fan to control speed, you need the fan controller on the motherboard to support variable speeds... I have 5 fans in my latest system all 3 pin except for the CPU fan. 3 of the 5 support dynamic speed, the other two are fixed speed fans

 

 

Ah so it's not that then... it appears to support it, it's a MSI motherboard and in the BIOS it has the option to control the fan speed, it allows me to select a minimum and maximum based on temperature or manual speed.. this works when i control the CPU, but when i try to control SYS_1 and SYS_2 fans it does nothing.



#10 +Brando212

Brando212

    Neowinian Senior

  • Tech Issues Solved: 16
  • Joined: 15-April 10
  • Location: Omaha, NE
  • OS: Windows 8.1
  • Phone: Sony Xperia ZL, Nokia Lumia 925

Posted 17 October 2013 - 18:42

you have an msi board?

 

your best bet will be to install the MSI Control Center & turn on the smart settings for both fans (though i think that uses the 4th pins which you said your fans don't have)



#11 OP goodbytes

goodbytes

    Just below average Joe

  • Tech Issues Solved: 1
  • Joined: 07-May 04
  • Location: England

Posted 17 October 2013 - 19:47

you have an msi board?

 

your best bet will be to install the MSI Control Center & turn on the smart settings for both fans (though i think that uses the 4th pins which you said your fans don't have)

 

Yup tried it.. does nothing :( so once again i need new fans? :) lol



#12 Neu B

Neu B

    Neowinian

  • Tech Issues Solved: 2
  • Joined: 16-April 11

Posted 17 October 2013 - 19:54

Yup tried it.. does nothing :( so once again i need new fans? :) lol

You need to have 4 prong plugs on your fans if you want to control the speed based on temps.



#13 OP goodbytes

goodbytes

    Just below average Joe

  • Tech Issues Solved: 1
  • Joined: 07-May 04
  • Location: England

Posted 18 October 2013 - 07:33

You need to have 4 prong plugs on your fans if you want to control the speed based on temps.

 

Thanks, i'm leaning towards the Noctua NF-S12A PWM http://www.quietpc.c...CFQXHtAod_D8AGA for case fans and then the Noctua L9i http://www.quietpc.com/nh-l9i  for cpu cooler 



#14 vetneufuse

neufuse

    Neowinian Senior

  • Tech Issues Solved: 1
  • Joined: 16-February 04

Posted 18 October 2013 - 13:27

You need to have 4 prong plugs on your fans if you want to control the speed based on temps.

 

no you don't.. I have 3 pin fans that control based on temps also.... the 4th pin is only a control pin, and usually only used on CPU fans.. 3 pins are +12VDC, GND and SENSE.. the boards usually have temp sensors on the board when they are temp controlled fans close to the part they are measuring. My MSI board for example has 3 temp controlled fans, each one has a thermistor near the component that reports the temp to the motherboard which through BIOS tells a voltage controller on the motherboard to increase or decrease the voltage to the 3 pin fan port for it's associated device... you just need to know what ports are tied to thermsistors your motherboard manual tells you this

 

here's the big question... you have a fan, I assume it has a 3 pin connector, but does that three pin connector have 3 wires going to it from the fan? if it's just a red and black wire you need a new fan probably.. If you have a yellow wire also you have a true 3 pin fan... CPU's have red, black, yellow and blue



#15 Neu B

Neu B

    Neowinian

  • Tech Issues Solved: 2
  • Joined: 16-April 11

Posted 18 October 2013 - 13:47

no you don't.. I have 3 pin fans that control based on temps also.... the 4th pin is only a control pin, and usually only used on CPU fans.. 3 pins are +12VDC, GND and SENSE.. the boards usually have temp sensors on the board when they are temp controlled fans close to the part they are measuring. My MSI board for example has 3 temp controlled fans, each one has a thermistor near the component that reports the temp to the motherboard which through BIOS tells a voltage controller on the motherboard to increase or decrease the voltage to the 3 pin fan port for it's associated device... you just need to know what ports are tied to thermsistors your motherboard manual tells you this

 

here's the big question... you have a fan, I assume it has a 3 pin connector, but does that three pin connector have 3 wires going to it from the fan? if it's just a red and black wire you need a new fan probably.. If you have a yellow wire also you have a true 3 pin fan... CPU's have red, black, yellow and blue

He can have more control over the fans with 4 prongs and the right software. He will have an option to turn any case fan off if the machine is idle. All my fans have 4 prongs and are software controlled. Couple of the fans don't turn on till the case reaches certain temperature. Having options is very nice :-)