PC Fans max out randomly

[Evil Ninetales]

If I'm web browsing or doing anything at all my pc fans ( Noctua 120mm x4 / Noctua 140mm x2 ) randomly kick right up to max speed for around 6 seconds and then back to what they were at previously.

CPU Temp : 19'C ( Liquid )
GPU Temp : 34'C ( Liquid )

I've checked the fan speed ramp and it's nowhere near the 100% mark ( Not that it would ever get 70'C To go at 100% ).

Any help would be fantastic.

Motherboard is Gigabyte z170XP-SLi
CPU is i5-6600k
GPU is MSi Gaming X GTX 1080.

[Bad 💀 Motha]

All those plugged into Motherboard fan headers?
I'd seriously get a fan controller.

Don't really need any custom fan speed ramps configured.
he hardware is already pre-configured for all of that.

Just monitor the Temps; below 80-85*C ranges for both your CPU & GPU when under high sustained loads, would be fine.

[Revelene]

What are you using to control the fans?

[Air]

I once had the same situation with a Gigabyte motherboard in the past(albeit a cheap one in a pre-built PC with no fan control options). Basically, I believe that the fans did not gradually ramp up in speed, but only had a few set speeds set in the BIOS.

I'm not too familiar with the current Gigabyte UEFI menu, but it might be worth checking for any fan control options in there.

[Evil Ninetales]

Originally posted by Bad-Motha:

I'd seriously get a fan controller.

Originally posted by Air:

it might be worth checking for any fan control options in there.

Thanks for the replies guys but They are all hooked up to a fan controller right now ( Phanteks PWM fan hub ).

I'm using Gigabyte's app center to control the speeds. They are working as intended ( Ramping up when playing games etc ) It's just the random jumps to max speed that are boggling me.

EDIT : The controller is plugged into CPU_FAN port on motherboard and all ramp up and down as intended by the speed ramp in the app if that helps.

[Bad 💀 Motha]

There's your problem; all your fans are doing that because really, the Motherboard is just trying to do that change to CPU_FAN; the end result is that is doing it to all your fans due to how you have it hooked up.

Look to be honest, it's not a good idea this way. All you should plug into a CPU Fan header is a CPU cooler mounted fan, nothing else.

In BIOS: Disable any fan profile for "CPU Fan" and then have the Fan set to PWM
Don't share CPU Fan Header #1 with any other fan. If you have a push+pull CPU Cooler and lack a Header #2 for CPU Fan; fine, makes sense. Otherwise no.

Other fans should use the other headers, 1x Fan per Header.
You could double them with splitter, that's about as far as I'd go with that.
Long as not exceed 1.0A per Fan Header.
If you're going to have a high # of fans, then do that via PSU Powered Fan Controller.

All that needs auto control really is your CPU Fan and GPU Fan(s).
The rest, generally unless Gaming or doing something really demanding to stress the system for a lengthy period; all the rest of the fans on "Quiet" should be fine. Ramp them up manually as needed during Gaming.