All "Diffuse-Albedo-Color" need to be, or at least they would be in an sRgb color space (in my experience), inside the diffuse node. On the contrary the other maps such as: Normal, Specular, Roughness, etc ... They should be set to "Non-Color" in the nodes.
Now the question I ask is the following: I would like to keep the sRgb color space, and create a group that transforms (Or at least simulates) this "Non-Color" color space. Is it possible to reproduce a procedural transformation after the 'TEX_IMAGE' node? The group would be immediately after the image and would serve to transform it into Non-Color
I'm not sure about this, and I'm not even sure if it requires additional hardware consumption.