Oh alright. Thanks!
After bricking it, I was afraid to use MPT as well to increase the Memory frequency and reduce the voltage.
Will try this now!
Don't be afraid to use MPT, because this program will only modify parameters on windows, the bios of your GPU will stay untouched, without any kind of modification.
This is the good side of MPT
I used this video to learn how to do the "soft mod":
https://www.youtube.com/watch?v=X77N4sDXP9g&t=353s