What has significant effects on stable diffusion generation times? I'm trying to learn to build a pc for that specific purpose and because I'm starting from basically 0 its kinda hard. Obviously the GPU matters the most, but it also can connect to the motherboard through different gens of pci express. From what I know (I think?) this wouldn't affect generation much, only initial loading. RAM, I have no clue what effect it would have on anything, same with CPU. So how do these 2 affect stable diffusion?