Need assistance to OC my GPU

Hello there, i’m not a technical user.
I didn’t managed to follow this tutorial correcly :

So i tried with gwe ( green with envy ) and i could apply settings only on the wattage. The oc and the fan control option return me a “error applying option”

Then i tried with corectrl but the only the cpu appear.

And after checking this NVIDIA/Tips and tricks - ArchWiki i didnt wanted to do anything stupid.

So here i am asking for help:
At the step 2.2 of the tutorial i have this error message.

[root@cachy NVIDIA]# source /root/NVIDIA/venv/bin/activate.fish
-bash: /root/NVIDIA/venv/bin/activate.fish: ligne 4: erreur de syntaxe près du symbole inattendu « -d »
-bash: /root/NVIDIA/venv/bin/activate.fish: ligne 4: `function deactivate  -d "Exit virtual environment and return to normal shell environment"'

In the /activate.fish ligne 4 its written

# This file must be used with "source <venv>/bin/activate.fish" *from fish*
# (https://fishshell.com/). You cannot run it directly.

function deactivate  -d "Exit virtual environment and return to normal shell environment"

to me its chinesse but if someone have time, knowledge and kindness to help me me and my potato gpu would appreciate !

EDIT:

i’ve try the method 8.1.3 from the arch wiki. i type desired offclock in nvidia settings (nothing happend)

then tried to save them with this command but i had this return

nvidia-settings -a "GPUGraphicsClockOffset[performance_level]=offset"

ERROR: Error parsing assignment 'GPUGraphicsClockOffset[performance_level]=offset' (Malformed display device identification).

same issue when i try this one

nvidia-settings -a "GPUGraphicsClockOffset[level]=100"

just an update:

i’ve managed to Overclock under X11 by doing this :

Set

needs_root_rights = yes

in the file /etc/X11/Xwrapper.config

as stated here Cannot overclock gpu after nvidia upgrade / Kernel & Hardware / Arch Linux Forums and it works.

How bad/dangerous is it to run xorg as root ?
i’ll find a way to make the overclock permanent anyways