Weird CPU temp behavior?

[MisterMeow]

https://gyazo.com/d8a146e315b67fe91ac0a23c085d6148

 

Above is a gyazo of what my cpu does randomly. It only happens while watching certain videos in chrome. It's an R5 2600 ocerclocked to 4.1ghz. I can make the behavior stop by changing the idle power draw setting in my bios to performance (Asrock B450 Pro4), but doing so causes my cpu to idle around 6-10 degrees higher. You can see pretty clearly where the video starts and when I pause it just based on the temp graph. Anyone know if this is normal when overclocking ryzen chips?

[Ralphred]

It does look to be a very drastic hysteresis, as if the fan is either on or off, no middle ground. Have you checked the fan curve in the bios?

[MisterMeow]

10 minutes ago, Ralphred said:

It does look to be a very drastic hysteresis, as if the fan is either on or off, no middle ground. Have you checked the fan curve in the bios?

CPU fan curve is set to performance.

[Ralphred]

2 minutes ago, MisterMeow said:

CPU fan curve is set to performance.

What does that mean in real terms, what does it look like?

[MisterMeow]

I have a wraith max cooler because I wanted downward airflow for the VRM's. So I'm not using the stock cooler.

[MisterMeow]

5 minutes ago, Ralphred said:

What does that mean in real terms, what does it look like?

The bios doesn't really specify. The only difference I've noticed is that the fan ramps up faster under load. But under 65-70c there's no noticeable difference.

[Ralphred]

Can you make a custom curve, ramp it up slowly at first, then increasing, like a hockey stick on it's side?

[MisterMeow]

1 minute ago, Ralphred said:

Can you make a custom curve, ramp it up slowly at first, then increasing, like a hockey stick on it's side?

The asrock bios doesn't have that much control for fan curves, it's just 3 standard profiles you get to pick from. I'm just not 100% sure if that's bad for the cpu or not. I haven't seen issues with it yet, but I've also never seen cpu's do it before in my other systems.