Question Can a motherboard slow down a CPU

[Kracor]

Hello,
I recently tried a dual psu in my computer (I know it's dumb) and my CPU is really slow now. Is the motherboard or CPU damaged?

 

[SkyNetRising]

Check temperatures of your cpu. It might be thermal throttling.

 

[Kracor]

Check temperatures of your cpu. It might be thermal throttling.

No thermal throttling problems, only reaching 40C