CPU and MoBo fan error

Martines91 · May 23, 2015

Hi, I have a ASUS M5A97 R2.0 MoBo and a Arctic Freezer Xtreme Rev 2. as a CPU cooler, somehow everytime I boot up my PC my AI suite II says "Warning CPU_Fan 0 rpm" which is stupid, because I know it works, and in fan xpert it shows this nonsense:

as you can see it shows 0 rpm @ 20%, I have bought a new case with new fans for better cooling since the last one I had was terrible, I have now Zalman Z11 HF1 with 7 Noctua fans, 1x NF-P12, 4x NF-S12A, and 2x NF-A8 so the case is cooled, I don't know what my MoBo is thinking, but it's really annoying, anyone knows why am I having this kind of problem? thanks

MeltingPoint · May 23, 2015

RPM sensing sometimes go nuts when it goes below a certain level.

There may be a setting in the program that will ignore 0rpm warnings.

Speaker1264 · May 23, 2015

Hi, I have a ASUS M5A97 R2.0 MoBo and a Arctic Freezer Xtreme Rev 2. as a CPU cooler, somehow everytime I boot up my PC my AI suite II says "Warning CPU_Fan 0 rpm" which is stupid, because I know it works, and in fan xpert it shows this nonsense:

as you can see it shows 0 rpm @ 20%, I have bought a new case with new fans for better cooling since the last one I had was terrible, I have now Zalman Z11 HF1 with 7 Noctua fans, 1x NF-P12, 4x NF-S12A, and 2x NF-A8 so the case is cooled, I don't know what my MoBo is thinking, but it's really annoying, anyone knows why am I having this kind of problem? thanks

Yes, every fan has a low limit before it will still giving bad readings. My two 200mm case fans start giving bad readings below 21%, my 120mm case fan below 29%, and my cpu heatsink with dual 140mm fans that are both powered through a single pwm header limit is below 27%. What you need to do is test where the limit is on your fan and make sure that the software doesn't go below that limit, or else it will start getting bad RPM readings.