Using Speed. Fan to automatically control your PCs fan speeds unitstep. Speed. Fan is a great utility for enthusiasts whove built their own PC. Besides being able to show the temperatures inside your system from various sensors in the CPU, motherboard and HDDs and other vitals such as voltages and fan speeds, it can also automate the cooling cycles of your machine. As its namesake implies, Speed. Fan is able to automatically control your computers fan speeds based on the temperatures reported by various hardware sensors. This can allow you to find the right balance between a cool system and a noisy one. However, it does require some configuration, as Ill attempt to show you in the following article. Its all in the details. All the material Im about to present here is available in the help file for Speed. Fan, however, since most people use the Internet for everything, myself included, I thought Id summarize the most important points. Download Best Rivatuner Download Free - Download Full Version' title='Download Best Rivatuner Download Free - Download Full Version' />Speed. Fan has a lot of functionality and its easy to get lost in all of that when all you want is something simple like automatic fan control. Some motherboards already support this, but Speed. Fan brings this functionality to almost any motherboard thats reasonably newFirst and foremost, the fans that you want to control must be plugged into one of your motherboards 3 pin fan headers they cannot be plugged into 4 pin molex connectors that come straight from your power supply. This is because Speed. Fan controls fan speeds by varying the output using PWM of the 3 pin fan headers on your motherboard. Music Michael Jackson Rare Songs on this page. If you want to control the speed of your 4 pin fans, youll have to use some sort of fanbus or external fan controller. Getting started. On the main Speed. 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However, checking it is not enough to properly set it up, though it would be nice if things were this easy For now, you can check it, but nothing will happen you shouldnt notice any change in your fans speeds. Click on Configure to bring up the options window. Speed. Fan is a fairly powerful program, but that means configuration is required to make it do what you want. The assumption that Speed. Fan uses is that various temperatures can be influenced by the various fan speeds in your system. You need to define these relationships. For example, in my system Temp. CPU temperature. I havent bothered to rename the labels In the screenshot below, I have linked it with Speed. Speed. 02, which correspond to my CPUs fan and a case exhaust fan. This tells Speed. Fan that it should vary these fan speeds based on the temperature theyre associated with. You also need to configure threshold temperatures there are two, Desired and Warning. The desired temperature tells Speed. Fan what it should aim for. Once the desired temperature is reached, Speed. Fan will begin to drop fan speeds down to some minimum you specify if the temperature is above desired fan speeds will increase by an amount related to how much the temperature is above the desired. Once the temperature reaches the warning value, fan speeds will be set to maximum. We now need to configure each of these fans. Go to the Speeds tab not the Fans tab of the configuration and youll see a window like this Remember that Speed. Speed. 02 are linked with the Temp. Here is where we define the minimum and maximum fan speed values. When the temperature is at or below desired, the lowest the Speed. Ive specified is 1. This range is for temperatures up to the warning value. When the temperature is at or above warning, the fan speeds linked to it will be set to 1. This is a sort of fail safe to prevent overheating better safe and noisy than silent and sorry. Also important to note is that you must check Automatically variated for each fan you want to automatically control. This is separate from the main automatic fan speed checkbox on the main Speed. Fan window we saw earlierYou may need to experiment to find out what are the best values for minimum and maximum fan speeds. Also, some fans fail to report their rotational speed RPM when spinning slower, so you may get a reading of 0 RPM within Speed. Fan. Youll need to actually check whether this is the case. One last thing you may want to configure is how fast Speed. Fan will begin to adjust fan speeds when it has to respond to a temperature change. This is accomplished by setting the Delta value on the Options tab of configuration This sets the step size in percent for fan speed changes. With a larger value, Speed. Fan will adjust fan speeds more quickly since it will be increasing or decreasing by that amount each time. Experiment to find what works best. Windows 7 Home Prem Oa Acer Group. Ive found that with too large a stepdelta size, temperatures and fan speeds will oscillate basically the fans will speed up too fast, causing the temperatures to drop, which in turn cause the fans to slow down too much, which then causes temperature to rise again, completing the cycle. If youve taken a course in control theory youll realize that this is perhaps the classic example problem in control theory. By adjusting the delta value I believe youre adjusting the proportional value of the controller though I am not sure if Speed. Fan implements a full PID controllerLastly, you may want to check Set fans to 1. Speed. Fan this is another protective feature. Finishing up. Click OK on the configuration page to save your changes, which should bring you back to the main window. Then, make sure Automatic Fan Speed is checked here, and your system should now be set up for automatic fan control I have been using Speed. Fan for a few years and wasnt aware of this functionality until recently.