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Controlling Fan Speed

I

imported_Seer

Senior member
Besides installing a fan controller, is there any way to controlthe speed of my fans? I have the AMD heat pipe HSF, which I hear is thermally controlled, and Im wondering if it automatically activates or what, because speedfan registers it as 100% all the time. Do I have to enable CnQ? I heard that was bad for O/Cing.

I also have an exhaust 120 mm fan (3 wire) hooked up to my mobo. When I raise/lower the percentage speed in speedfan, nothing happens.

-Slightly Confused
 
Try looking for fan speed controls in your BIOS.
If Speedfan isn't working to controll it, get either a Fanmate 2 per fan (fits inside PC, no lights), or the Sunbeam Rheobus (not the PWM one--this thing should have four heatsinks!).
 
You have to configure SpeedFan if you want it to control your fans. Hit the configure button set you desired speed and temps in the "temperatures" and "speeds" tabs.
 
Speedfan doesn't always work for all fan headers, for instance I can control my CPU fan but not the other two headers on my mobo. Definitely the first thing you should try though since it's free.

-z
 
So, I turned on CnQ and set everything back to stock tos ee if I could get the fan speed controlled. I have my case fans on low power PSU "fan only" connectors, so they are pretty much silent, but my CPU fan speed never goes down, even when the cpu speed does. It's the stock AMD heat pipe cooler, so it should have a thermal sensor in it and all that. Any recommendations?
 
Didn't realize it was teh optie heatsink. Uninstall SpeedFan and try it again. Sometimes thermal controls and SpeedFan argue with each other, causing the fans to run at full speed.

-z
 
Originally posted by: Seer
So, I turned on CnQ and set everything back to stock tos ee if I could get the fan speed controlled. I have my case fans on low power PSU "fan only" connectors, so they are pretty much silent, but my CPU fan speed never goes down, even when the cpu speed does. It's the stock AMD heat pipe cooler, so it should have a thermal sensor in it and all that. Any recommendations?
Click to expand...

CnQ has nothing to do with fan speeds that?s handled by a separate function of your board (if it's present). Asus for example has Q-Fan, Aopen has SilentTek, MSI has Core Cell.
 
If a fan is already thermally controlled (as you say the one on the AMD HS is), then you do NOT want to add any other control - it depends on being at full voltage at all times and that is why SF reads 100% all the time. What you want to do is monitor the RPMs of the fan using the Hardware Monitor software that came with your mobo or Speedfan if it is capable of monitoring as well as controlling to see what the RPMs are doing over time. It would be nice if there was some software that would run a simultaneous chart of RPM vs. CPU temp over a good period of time.
. I have most of my fans connected to a fan controller (Sunbeam Rheobus) as none of them are thermally controlled (or if they were, I bypassed the sensors so I could control them manually). Works great for me as I seldom stress my CPU.

.bh.
 
Originally posted by: Zepper
If a fan is already thermally controlled (as you say the one on the AMD HS is), then you do NOT want to add any other control - it depends on being at full voltage at all times and that is why SF reads 100% all the time. What you want to do is monitor the RPMs of the fan using the Hardware Monitor software that came with your mobo or Speedfan if it is capable of monitoring as well as controlling to see what the RPMs are doing over time. It would be nice if there was some software that would run a simultaneous chart of RPM vs. CPU temp over a good period of time.
. I have most of my fans connected to a fan controller (Sunbeam Rheobus) as none of them are thermally controlled (if they were, I bypassed the sensors so I could control them manually). Works great for me as I seldom stress my CPU.

.bh.
Click to expand...

There isn't anything wrong with using a fan that is thermally controlled and slowing it further as long as you don't completely stop the fan. The reason SpeedFan is reading 100% is because it hasn't been configured; by default it runs everything at 100% until you tell it otherwise.
 
Yea, I've told speedfan to automatically control my fan speed. The % number goes down, but the RPM just stays the same. I'm getting conflicting instructions, so now I'm even more confused.
 
the % goes down but the RPM stays the same...

Don't you see what's happening there? SF drops voltage so temp goes up some, internal thermal control compensates to maintain lower temp... So rpm stays about the same. You don't want to add ANY control to the AMD fan until you have determined if the balance of temps and noise it provides in stock condition suits you or not. If not, then mess with it. As I said, the thermally controlled fan on it is designed to be run at full voltage all the time. Adding another controller can cause the final voltage to drop below stall - but if you have your alarms set properly you'll be told about it (if you're in the room at the time) and/or the system will be shut down if the situation gets too bad.

.bh.
 
Originally posted by: Zepper
the % goes down but the RPM stays the same...

Don't you see what's happening there? SF drops voltage so temp goes up some, internal thermal control compensates to maintain lower temp... So rpm stays about the same. You don't want to add ANY control to the AMD fan until you have determined if the balance of temps and noise it provides in stock condition suits you or not. If not, then mess with it. As I said, the thermally controlled fan on it is designed to be run at full voltage all the time. Adding another controller can cause the final voltage to drop below stall - but if you have your alarms set properly you'll be told about it (if you're in the room at the time) and/or the system will be shut down if the situation gets too bad.

.bh.
Click to expand...

Somehow I don't think that's what is happening, because when I tell speedfan not to control anything and just monitor, the rpm stays just as high. CPUZ reports that the processor is indeed throttling itself down to a 5x mult when its not needed, and the voltage is lowering.
 
Originally posted by: Zepper
the % goes down but the RPM stays the same...

Don't you see what's happening there? SF drops voltage so temp goes up some, internal thermal control compensates to maintain lower temp... So rpm stays about the same. You don't want to add ANY control to the AMD fan until you have determined if the balance of temps and noise it provides in stock condition suits you or not. If not, then mess with it. As I said, the thermally controlled fan on it is designed to be run at full voltage all the time. Adding another controller can cause the final voltage to drop below stall - but if you have your alarms set properly you'll be told about it (if you're in the room at the time) and/or the system will be shut down if the situation gets too bad.

.bh.
Click to expand...

It wouldn't work that way. SpeedFan makes immediate changes to the fans speed. The stock AMD HS/F relies on thermal probe built into the fan and has to wait for the actual air temp to rise before any change occurs, the changes happen slowly.

Originally posted by: Seer
Somehow I don't think that's what is happening, because when I tell speedfan not to control anything and just monitor, the rpm stays just as high. CPUZ reports that the processor is indeed throttling itself down to a 5x mult when its not needed, and the voltage is lowering.
Click to expand...

What board are you using? It sounds like SpeedFan might not support it, I would try to control the fans through the BIOS if you can.
 
Originally posted by: Seer
ASRock 939Dual SATAII. It's not in speedfan's list of mobos. And, IIRC there are no fan controls in the bios ><
Click to expand...

ASRock is the budget line of Asus so they don't get all the features the Asus boards do. I know some of the ASRock boards do atuomatic fan control; sadly I think you are out of luck 🙁.
 
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