A quick question about underclocking

[petter12maria]

Hello there,
I'm in a deep trouble right now.
My laptop is running fine, and when it comes to gaming, it performs pretty well.
Well at least, for a minute or so, when he thinks that he's eventually overheating.
It's not overheating, he's got an external fan, and he's cool. But after every 3 second or so, the laptop fan keeps getting louder, and it eventually slows down the processor, causing huge lag spikes.

Is there any way to stop it from UNDERCLOCKING? I take responsibility if it causes damage
Thanks in advance

 

[rgd1101]

did you actually check the temp or you use assume it not overheating?