Windows power plan and brush performance !

[cgidesign]

I found out why my brush speed was slow. I thought I need hardware acceleration, but no - changing a wrong Windows setting was good enough.

For some reason the max. CPU performance was set to below 100% in the Windows power plan.

Anything below 100% (even 99%) is severely downclocking my CPU.

With - now - 100% max. performance the brushing is ok for me.

Maybe that helps others as well.

 

[debraspicher]

Both screens depict the same behavior. The section you are reading is current speed. It is not your boost/max speed. This number varies by a lot depending on any number of things. If you look at your base speed in both, they are actually the same. The 4.x is boost behavior and lasts for a short period and is typical at low utilization/single core operations. Pulling up something like HW Monitor to monitor clocks and running Cinebench multi-core benchmark on all your cores will give you more realistic maximums. You could move to High Performance profile to maximize performance.

[cgidesign]

Yes and no - the screenshots were taken while I was continously painting wth a huge bush for some time. It seems the cores driving the brush engine can hold the turbo boost for a long enough time (even though I hear the fans working then). An "all core boost" would not last long but as it is on my notebook, for brushing it has enough cooling power (well, it's a gaming notebook, it was build for exactly this scenario, I just feel stupid to not have checked the power plan earlier).

[cgidesign]

I investigated a bit more.

I was a bit wrong regarding the details. APh is using all cores for brushing, not only a few ones (seems to be a well implemented multithreading).

PowerPlan CPU = 95%

If CPU in PowerPlan is set to 95% it maxes out at 2.36 GHz.

APh idle - no load

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APh at full load (huge airbrush many layers and adjustments) - brush is lagging and stalls after some time. I have to wait a few seconds till APh finishes the queued strokes.

 

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PowerPlan CPU = 100% - CPU is throttleling at full load but is still fast enough for smooth brushing - full turbo would be around 4.4 GHz but it runs at max 3.9 GHz at full load.

 

 

Ignore the below screenshot - it appears here even though I deleted it (it is a copy of the one from the top).