I know all this and everything about luck factor, but I ran ccminer 2.2.2 cuda 9 for 2 days and never got to more than 12mhs on miningpoolhub chart and my rig was producing 18.6mhs all the time. Someone wrote that there is some problem with the miner and some custom miner fix this...
What are your clock settings for getting 3.3mhs mining XCZ with 1080ti?
So as you can see by screen, my settings are Pl 80%, core clock + 78, memory -502
and this is Zotac GTX 1080ti amp extreme pushes 3338 kh/s
which is rather nice I think
Hmmmm
Mine is the MSI Gaming X 11G and I'm at 80% TDP, +115 core, mem -502 and only getting about 3100 MH