Question I think my pc isn`t working properly, help pls

I got a pretty standart computer, but I think that its not working how it should, I am getting 120 fps on CS:GO, and I used to get 200+, do u guys think that theres a problem ? And how can I fix it

Here are my CPU-Z prints: View: https://imgur.com/a/dGL7ukO
How much ram do you know you have? 8GB or 16GB? As was said, you are running single channel mode with only one 8GB module. If you had 2x8GB and you used to get higher fps, something may be wrong with your motherboard.
 
Are you sure you were getting 200fps before you noticed it being only 120+? Have you recently updated the Nvidia driver. Have you reinstalled the game or changed any graphics settings? Have you check that vsync is off in game if you have a 120-144hz monitor?

Although having 1 memory module isn't great, it shouldn't be what dropped your fps by 80+fps.