one CPU core at 100% all the time when GPU-Z is running

[Florin Andrei]

GPU-Z 2.53.0 on Win10 on an Acer Predator laptop. System details:

TechPowerUp

www.techpowerup.com

GPU-Z is configured to start automatically, minimized to systray.

As long as GPU-Z is running, one CPU core out of 12 is always at 100%. Even when the app is minimized to systray, one core is still busy. Or if I maximize the app, it's still the same. It's annoying because the fans spin a little faster than what's normal for idle mode. So the laptop is never fully quiet anymore.

If I quit GPU-Z, then CPU usage returns to very close to 0 on all cores.

Looking at the Processes tab in Task Manager, it's the System process that uses the core. When GPU-Z quits, System returns to near 0% CPU usage.

I believe this has started to happen recently, but I don't know exactly when.

 

[Solaris17]

Are you logging?

 

[GerKNG]

tested version 2.52 and 2.53: CPU Usage is from the application is 0%.

 

[Florin Andrei]

Are you logging?

View attachment 292413

Nope. The Log To File checkbox is not selected.

 

[Florin Andrei]

tested version 2.52 and 2.53: CPU Usage is from the application is 0%.

In my case that is also true.

It is the System process that takes an entire core, not the GPU-Z process. But the correlation is unmistakable: when I kill the GPU-Z app, the System process does not take an entire core any longer.

 

[GerKNG]

well this can be everything then... from power plans over background updates to defender stuff.

 

[ThrashZone]

Hi,
Try the portable ROG version I'm using 2.52 I don't see any cores stuck on max.