Is there an issue with my CPU Fan?

[sameijg]

I just setup my first ever computer build, a gaming PC.

I'm using the fractal define r5 case, with a gigabyte z170x gaming 5 motherboard, an i7 6700k processor, a hyper eva 212 CPU cooler, and a gold evga 650 watt power supply.

I never really setup a video card or hard drive yet (still waiting on the hard drive and haven't ordered a video card yet), but I wanted to setup everything else and make sure that things are running smoothly.

I hooked it up and started the computer to see if it's working and also I wanted to check the bios because I know that will start work without a hard drive, and everything seems to be working properly, but I was just a bit concerned by some of the statistics in there and it may be nothing, but I just thought it would be a good idea to check with you guys first.

Running the PC for a couple minutes and it shows:
CPU Temp: 29C-31C
System Temp: 29C-31C
CPU Fan: 800RPM

I forget about the other two fans.. But I think the were around 400 RPM.

Now what was concerning was... the CPU fan and one of the other fans were randomly flashing to 0 RPM for a split second.

Do you guys think there is an issue there or would you be able to explain what's going on? I guess I'm just worried that maybe there is a power issue.. I'm not sure... by the way. I didn't use the fan controller up in the front panel of my case. I just plugged all the fans into the MB instead.

 

[Chicano]

The 800RPM is normal for the 212 EVO if the CPU is not doing much besides showing the BIOS.. as for stopping momentarily, it may be for the same reason. The heatsink is large and without CPU activity it may be enough to cool it down. There is also the BIOS power saving settings... they should be enabled by default so the fan speeds are subject to fluctuation and even stopping, the 29-31ºC suggests that's exactly what's going on.

You can disable the fan speed management in the power saving settings to see the difference. The motherboard PDF user manual should have the information for tweaking the power saving settings. Try disabling "Platform Power Management" see in page 34 of the PDF Manual. http://download.gigabyte.us/FileList/Manual/mb_manual_ga-z170x-gaming5_e.pdf


GA-Z170X-Gaming 5 (rev. 1.0) manual downloads
http://www.gigabyte.com/products/product-page.aspx?pid=5498#manual


Cooler Master Hyper 212 EVO - CPU Cooler with 120 mm PWM Fan
600 - 2000 RPM (PWM) ± 10%
24.9 - 82.9 CFM ± 10%
Aluminum
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103099

 

[sameijg]

The 800RPM is normal for the 212 EVO if the CPU is not doing much besides showing the BIOS.. as for stopping momentarily, it may be for the same reason. The heatsink is large and without CPU activity it may be enough to cool it down. There is also the BIOS power saving settings... they should be enabled by default so the fan speeds are subject to fluctuation and even stopping, the 29-31ºC suggests that's exactly what's going on.

You can disable the fan speed management in the power saving settings to see the difference. The motherboard PDF user manual should have the information for tweaking the power saving settings. Try disabling "Platform Power Management" see in page 34 of the PDF Manual. http://download.gigabyte.us/FileList/Manual/mb_manual_ga-z170x-gaming5_e.pdf


GA-Z170X-Gaming 5 (rev. 1.0) manual downloads
http://www.gigabyte.com/products/product-page.aspx?pid=5498#manual


Cooler Master Hyper 212 EVO - CPU Cooler with 120 mm PWM Fan
600 - 2000 RPM (PWM) ± 10%
24.9 - 82.9 CFM ± 10%
Aluminum
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103099

That makes sense then. One thing though.. One of the other fans (just a normal sysfan not using the fan controller) is doing it too. Does the motherboard do power management for all the fans on the board? Or I thought for there to be any management then I would have to use the fan controller.

So that's pretty confusing 🙁 And then 1 of the fans is running normally.

I don't mind the power management, I just want to make sure everything is ok.

 

[Chicano]

Yes the BIOS can control fan speeds for power management on all fans connected to it... different speed for several fans may be due to different settings, fan location and heat it has to dissipate... or if they are not identical, same size or same brand; they may run at different speeds... so if you want better control over each fan check the BIOS setting for each or use the controller.