Smart fan control doesn't work

[Kotty]

Hey guys,

 

I recently RMA'ed my A10-5700 because PC was randomly freezing or restarting under GPU load. RMA was successful, I got my money back. WIth that said I had to purchase new APU and I decided to pick cheap A6-5400k to save some money. Everything seemed to be just fine, no freezing or restarting had occured. But then I decided to buy aftermarket cooler (Arctic Alpine 64 Plus) in order to quiet my PC down. Installation wasn't exactly the smoothest, it collides with ram stick a bit, however I managed to settle it down properly (I think, it doesn't wiggle or anything). I also cut a hole for 120mm exhaust fan in top panel and installed one. Both fans (exhaust and CPU) have 4-pin connector as well as corresponding connectors on motherboard. Thing is when I turn on PC fans just keep spinning at full RPM. I thought there could be an issue with temperatures so I downloaded couple of diagnostic programs to see what's wrong. But it only made me more confused. Coretemp shows 0°C, OCCT and Speedfan 124°C, Speccy shows 44°C, which is probably same value as AUX (auxiliary?) in Speedfan. However when I boot to BIOS, it shows merely 22°C. Also air that is blown out is very cool as well as CPU cooler that is very cold on touch in desktop mode and barely warm under load.

 

 

Specs:

 

APU: AMD A6-5400k + Arctic Alpine 64 Plus
MB: Zotac A75-ITX WiFi B-series
RAM: Crucial Ballistix Tactical 2x4GB DDR3 1866MHz
SSD: Cucial M4 128GB
PSU: be quiet! SFX POWER 2 300W
Case: Lian Li PC-Q03 + 120mm exhaust fan (modded case)
OS: Win 8 Pro 64-bit

[CzarFrog]

You could try updating your motherboard bios, older revs sometimes have wonky temperature reading errors that could cause this kind of incorrect information.

[Kotty]

Oh, I forgot to mention BIOS has already been updated to the latest version.

[Kotty]

bump, fans still keep spinning at full RPM.

[The Last MeMe]

If you are using any 4 pin splitters try without those. Try different fan slots if you can. It's also possible something could just be wrong with your boards fan pins also you could try changing the fan modes on your board from smart fan to something different

[Kotty]

Both fans are connected directly to my motherboard, bot are PWM fans with 4-pin connector (obviously). There is no splitter and there are only two 4-pin headers (1 CPU and 1 SYS). I was able to manually set the speed to 40% of their max RPM, but it's not very practical as it's just hard-set value (and definitely want fans to increase their RPM when needed). Good thing is temps basically hasn't increased at all (23-24°C in BIOS, 44-45°C in desktop and 69-72°C under load according to Speccy and HWInfo).

 

As for the 124°C readings, based on what I read on other forums, it could mean either that the sensor on MB socket is damaged OR sensor is not present at all. Anyway it seems like a common issue so I dont think it's somehow related to my main issue and that is fans don't adjust their RPM based on temperatures.

 

I also found out my RAM is not officially supported by this board and it only runs in 1333MHz instead of 1866MHz however I don't see how it could affect RPM of the fans in any way.

[Kotty]

bump

[MrKickkiller]

Wow, that is one smoking hot APU according to Speedfan and OCCT

If i were you, i might invest in a fan controller. A hardware version, not software.

With the fan controller you're able to get smart fan control without relying on the MB temp sensor.

[Kotty]

Wow, that is one smoking hot APU according to Speedfan and OCCT

If i were you, i might invest in a fan controller. A hardware version, not software.

With the fan controller you're able to get smart fan control without relying on the MB temp sensor.

As I typed above those temperatures are obviously not correct.

I would guess that Speccy shows more accurate value as it shows temps indicated by CPU sensor (HWMonitor shows the same value as Speccy). And those temps are still in the norm.

Hardware controller isn't an option for me because case has only one slim 5.25" bay, besides I don't really want to spend extra money on something that should work out of the box. Plus I don't want to spend my time fiddling with controllers whenever I load some game or demanding application.

I will probably just contact Zotac support and let's see where it gets me.