From our side the only application that we have available to monitor the fan rpms from windows is the Intel® Desktop Utilities but I am afraid that it is not possible to manipulate the settings of this fans from there.
I recommend you checking on the web for any third party software with this capability.
Intel(R) Desktop Utilities most definitely displays the CPU fan speed. Are you having a problem finding the display? Invoke the GUI (using the shortcut supplied or by double-clicking on the sensor gauge icon in the system tray), and then click on the "Hardware Monitor" tab. The summary display includes the CPU fan speed. You can also click on the "Processor" tab if you would like to see this presented in gauge form...
Do fan speeds show up when you are in Visual BIOS?
If they do, then, within Intel(R) Desktop Utilities, click on "Options" then "Set Sensor Thresholds" and then on "Fans Redetect". Reboot your system and check the Intel(R) Desktop Utilities display again. This should restore the display of the fan speed(s)...
Unfortunately neither the speed is shown in the visual bios nor your tip worked. I don't think that it is a problem of the fan itself because it already was attached to a Asus Board and there everything worked well.
Yea, if they aren't working in the BIOS, resampling them at runtime isn't going to make any difference.
I need more information to diagnose further. What fans do you have plugged into the board? Have you tried plugging them into different headers on the board (even temporarily) and checking in BIOS? Have you tried plugging other fans into the board? Is the CPU fan a stock heatsink-fan unit from Intel? If not, (a) what brand is it and (b) does it have a 4-pin connector or a 3-pin connector (and, if it's a 3-pin connector, does it have wires going back to the fan for all three pins)?
Are the fans that are plugged into the board changing speed? Unplug the system (or turn off power using switch on back of power supply if there is one) for ~15 seconds (at least until power LED on board goes out) and then plug it back in (or turn on power) and press the power button to start it up. The fans should start at a higher (louder) speed and then slow down (get quieter) as the BIOS initializes the eSIO. Do you hear this change?
I have only a Scythe Kubuto plugged into the Board. So it is not the one from Intel. The Board and the fan have a 4-Pin connector.
The CPU fan changes the speed if I change the minimal speed in the BIOS to 100% or if I plug it of and on again.
I'll try other fans and connector soon.
so pluging the 4-pin CPU fan tu the front fan input works, and pluging a 3-pin fan to the CPU input and the rear fan input works to.
After changing the CPU fan back to the CPU input and the 3 pin fan to the front input the RPM of the front fan is submitted, but not the RPM of the CPU fan.
Seems like if the fan and the input don't like each other.
Does anyone has a clue, why I am encountering these problems?
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I have an older Intel Z77 board and had issues with Corsair AF140s not showing their RPM, but both the Visual BIOS and the Intel Utilities Tools showed the headers and reported 0 RPM. It seems strange that you have no readout, I would expect it too at least show 0 RPM. If that was the case I would diagnose an incompatibility between fan and motherboard header, like my Corsairs.
The fact you have not fans showing in the utilities is very strange.
Explain again what you see in BIOS?
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First of all, some background comments...
1. The return signal from all fans (3- and 4-wire) is a tachometer signal. Typically (there area few exceptions), two tachometer pulses are sent per revolution. The monitoring device may work in a number of ways, but the net result is that it determines the number of revolutions per minute for the fan.
2. A monitoring device cannot detect the difference between a fan that is not spinning, a fan that is broken and a fan that is not present. In all cases, all the monitoring device sees is no tachometer pulses being returned.
Now, to address daveyg's comment, there is nothing strange going on with Intel(R) Desktop Utilities (IDU)...
IDU was designed to that it will not report that a fan is failing unless that fan has been seen to have worked properly previously. At the point where IDU is installed (or when a Redetect Fans operation is initiated by the user), it must presume that all fans connected to the motherboard are working properly. It (then) determines which fan headers have (working) fans connected to them by sampling to see which headers are currently receiving tachometer pulses from the attached fans. Support for monitoring the fan headers that do not have fans connected to them is disabled. If it is determined that no fans are present, the entire section of the summary display for fan speeds will not be included in the IDU display.
When attempting to determine what is going on in a case like this, the best bet is to use the scene in BIOS Setup (Visual BIOS) that displays fan speeds. It will display 0 RPMs if no fan is connected to a header (or is stopped or is broken).
Ok, to TCurts issue. For some reason, the board's monitoring device is not receiving any detectable tachometer pulses from this fan. There are many, many possible reasons for this, but they all fall into only a few categories, (1) incompatibilities between the fan and the board's monitoring device (very doubtful), (2) failures in the fan or (3) failures in the monitoring device. The easiest way to detect which category the issue falls into is to do the following:
1. Plug a different fan into the CPU header (this can be any 3- or 4-wire fan that you have; it doesn't matter for this experiment). Turn on the system and boot into BIOS Setup (Visual BIOS). If a non-zero fan speed is seen in the display, then a hairy finger is pointing at the Scythe unit. If the fan speed is zero, on the other hand, then a hairy finger is pointing at the CPU Fan Header.
2. Plug the Scythe unit into a different fan header on the board. If a non-zero fan speed is seen, then a hairy finger is pointing at the CPU fan header. If the fan speed is zero, on the other hand, then a hairy finger is pointing at the Scythe unit.
If only one has hairy finger(s) pointing at it, we will know that this is the unit responsible for the issue. If both have a hairy finger pointing at them, then we know that there is an incompatibility between the two.
If the culprit is the CPU Fan header, then contact Intel customer support by chat or by phone to arrange for the motherboard to be replaced...
Hello, thank you for information.
As I said above (perhaps a bit crypted):
-CPU fan works on front pin properly
-3 pin fan works properly on the CPU input
So we have two hairy fingers...
Yes. Hairy fingers pointing in both directions mean an incompatibility issue. Your choices are to replace the board or replace the cooling solution. If you have (or can borrow) another 4-wire fan - and this fan works in the CPU Fan Header - I would say replace the cooling solution. If this 4-wire fan also fails, then get the board replaced. Easiest thing to check is one of the heatsink-fan units that we ship with our boxed processors. Did you receive one originally?
I tested it with a old 4-pin fan. The scythe seems to be the problem.
As I don't want to buy a new fan I have the following question. Should there be any problems connecting the CPU fan to the front input and vice versa?