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laptop touchpad increase FPS !?


Hello everyone ! 

At the moment I have a problem of FPS that I can not solve!
I play with the version 1.3.1 in 64bits without mods, on laptop.

I have a big drop of FPS with big ships (200 to 400 parts) which is normal, but there is more important than usual!
I realized something: when I use the touchpad of my PC to zoom in / out (instead of the wheel of my mouse), instantly there is no problem! FPS go back up to 60, but only for a short time (15 seconds) before falling again !
I need to use the touchpad again for FPS to increase again 

Here is exactly what happens: (sorry for the quality) 
the FPS are reduced because of the video capture system, in fact it turns around 16fps when it lag and it rises to more than 40 once I zoomed with the touchpad

I tried to uninstall and re-download KSP, but that does not change anything

Did you know what's going on?
thank you

(sorry for my bad english, I'm french) 

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I've solve the problem ! 
what was happening was that: 
when I zoom (or scroll) with the touchpad, it boosts CPU clock speed to 100% (like here : https://www.youtube.com/watch?v=hknwpX1zuiw)
which means that KSP did not use 100% of the CPU (except when I was using the touchpad)
so I set the CPU speed to 100% by default instead of 5%  https://www.laptopmag.com/articles/use-maximum-cpu-power-windows-10

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That is just weird. If the game needs more CPU, it should be raising the core to 100% in its own. You shouldn’t have to change the minimum default. 

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