low fps Low fps overtime

[Verilly]

I have X550ik notebook

about 7-8 months i played rainbow six siege and fortnite

on rainbow six siege ultra settings, i have around 60 fps average with fps drops when i move around

on fortnite, with low settings i have around 80 fps average with a little fps drops

when i tried to use low setting and i got similiar fps but with no fps drops and so i used low settings

about 2 months after i quit from fortnite, my fps on rainbow is 50 fps and fps drops

so i mess around with wattman

i undervolt the gpu and set the temperature from 81 max to 80 max

and still the fps is not changing

then i realize about this month my average fps on rainbow is 40 fps

so i tested fortnite to see if the fps comes from update or from my laptop

then i found out my fps on fortnite drop massively to 40 fps

i've search everything and nothing came up

any solution?

[Shally]

6 minutes ago, Verilly said:

 

any solution?

Maybe the CPU/GPU is thermal throttling due to a dust build up inside the notebook

[Verilly]

how to solve it then?