I did know those things before hand but I really didn't really apply it here because I thought:
1) If it uses CPU, it must be pretty little usage. After all, it is a graphics mod.
2)A GTX 980 can still be considered a 1440p card depending on the game. The shaders I am using came out in the same year the card came out in, when it was a 4k card.
3)I am on 1600 x 900, so it can't really be my GPU on pretty low settings for the resolution multiplier and shadow multiplier, and I haven't heard of big performance complaints and I do trust the shader authors to be not be that incompetent at optimization.