As you can see here in my comparison and many other i’ve done before it is easy for new user or not daily users to make counter productive setup with luxcore : There are some test here again with luxcore and cycles theory build :
https://blenderartists.org/t/luxcorerender-v2-2/1148794
Luxcore isn’t using RTX core just hard Opencl compute unit of any card. And it is one of the best way to see real compute power of a given hardware when it come to rendering.