Hysteresis setting on or off?

[yourilevoye]

So I updated my CAM software for my NZXT Hue+ and it changed a lot.
I looked in my settings and I noticed a setting called Hysteresis. I looked what it means and it simply reads the temps and it causes that your fans don't do wierd stuff when the temps quickly lower or rise.
I sometimes have that my GPU makes some Revving sounds sinds it will start spin and stop again. I asked on the forum what could cause this. I remember someone said "poor hysteresis".

I was wondering if I should turn this on this setting. Will my GPU stop the revving? What will it actually do since I use auto fan speed settings?

Here I have a screenshot of the setting eplaination of the software itself: https://gyazo.com/7016387b2ffaf935766d6d1e9521c77b

 

[TJ Hooker]

That sounds more like some kind of fan stop feature on your GPU, where the fan turns off completely under a certain temp. I found this kind of annoying on my last card that had it, as even during normal desktop usage it would sometimes get hot enough for the fans to turn on (and then subsequently turn off), resulting in the fans audibly revving up and down.

The hysteresis setting might solve that, but you might also try just disabling the fan stop feature altogether. For my last card, I had to download a video card utility from the manufacturer (Gigabyte in my case), which had a setting to disable fan stop.

 

[Solandri]

In this context, hysteresis is just a slight lag between when your system hits a certain temp and the fan revs up (or down) to the pre-programmed speed for that temp. Instead of changing fan speed based on solely the most recent temp reading, it takes the last 5 temp readings, averages them (a sliding window average), and uses that to determine the fan speed. So if your system briefly rises above a threshold temp and quickly drops back down, the fan won't kick up in speed. Likewise if the temp drops below a threshold and quickly rises again, the fans won't slow down. The average temp for the last 5 temp readings has to be above or below the next threshold before the fan speed will change.

If you're experiencing or are annoyed by frequent changes in fan speed, or are experiencing short rev-ups and rev-downs (less than 5 sec), then turning on hysteresis will help minimize them.

 

[yourilevoye]

Both of you guys thanks for the clear answers!