I presume this is laptop specs.
ProMods is a heavy map mod, and there are going to be areas where it is going to lag, like really bad like some parts in Spain, and in the Autobahn - based on my experience (mostly on big cities). Using graphic mods like Project Nextgen or Naturalux (which I no longer use) is also going to need more resources.
8 GB RAM is decent enough for any game nowadays, but you may have trouble in places in ProMods and other mods that may require more memory.
CPU is good.
We have the same GPU. Just don't go all max and ultra, especially the scaling (I set most of my graphics to high, mirror quality and resolution to medium, and scaling to 200%).