Hello, I have a problem with my CPU fan. I have already checked many, many discussion on this forum but I found no answer, so I'm making a thread myself.
First off my cpu cooler is a Scythe Katana 3 and the motherboard is a Asus H97-plus. The fan has 4-pins and worked flawlessly (or almost) until now. Yesterday, after booting the PC (it was in stand-by, but it doesn't matter I think), the fan, which usually starts at really low speed, was at 100% speed (2800rpm). The fan stayed at such speed constantly since then, with the exception of 1-2 seconds every now and then when it goes back to a normal speed.
As I said, the fan has 4 pins, so it is powered through PWM as it has always been since now, I cleaned all the dust, even dismounted the fan, re-applied thermal paste to the cpu (there was no need though, the paste looked fine), and tried resetting the CMOS. I also tried to manage it through the BIOS, but if I try to edit the speed in settings, it resets back to 100% when I press Enter. If I try the q-fan control, it sets the fan to 100% speed as minimum speed. Sometimes it sets the fan just fine, on a reasonable speed, but upon leaving the BIOS it goes back to 100%.
I tried using AI Suite, the program sets the fan to run at 200 RPM on 0% and at 2800 rpm from 10% to 100%, as if there's no middle ground. The program could actually control the fan, but it's no solution, since as soon the CPU temp would touch 40C, it would go straight to 2800rpm again. Needless to say, CPU temperature is low and totally not the issue.
I had the same problem one year ago or so, it lasted about a week and in the end it seemed that cleaning the dissipator using canned air did the trick. This time did not though. The only difference is that last time, sometimes, when booting the fan would stay quiet for a minute or 2.
What am I missing to do yet?
First off my cpu cooler is a Scythe Katana 3 and the motherboard is a Asus H97-plus. The fan has 4-pins and worked flawlessly (or almost) until now. Yesterday, after booting the PC (it was in stand-by, but it doesn't matter I think), the fan, which usually starts at really low speed, was at 100% speed (2800rpm). The fan stayed at such speed constantly since then, with the exception of 1-2 seconds every now and then when it goes back to a normal speed.
As I said, the fan has 4 pins, so it is powered through PWM as it has always been since now, I cleaned all the dust, even dismounted the fan, re-applied thermal paste to the cpu (there was no need though, the paste looked fine), and tried resetting the CMOS. I also tried to manage it through the BIOS, but if I try to edit the speed in settings, it resets back to 100% when I press Enter. If I try the q-fan control, it sets the fan to 100% speed as minimum speed. Sometimes it sets the fan just fine, on a reasonable speed, but upon leaving the BIOS it goes back to 100%.
I tried using AI Suite, the program sets the fan to run at 200 RPM on 0% and at 2800 rpm from 10% to 100%, as if there's no middle ground. The program could actually control the fan, but it's no solution, since as soon the CPU temp would touch 40C, it would go straight to 2800rpm again. Needless to say, CPU temperature is low and totally not the issue.
I had the same problem one year ago or so, it lasted about a week and in the end it seemed that cleaning the dissipator using canned air did the trick. This time did not though. The only difference is that last time, sometimes, when booting the fan would stay quiet for a minute or 2.
What am I missing to do yet?
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