I AM NOT ON SP_ 's COMMISSION--
And I certainly cannot afford his mods. But, I was an enthusiastic tester mining x11 and Quark back in the day when they made major profit for GPU miners. I made voluntary donations now worth thousands of dollars. I doubt sp_ saved them long enough, probably spent on beer.
The miners you are arguing with likely earn more within a 2% -to- 10% improvement margin than your rigs can earn in total. Assembly language tricks do yield improvement, and sp_ does his own code on already good code. Other coders earn good money modifying memory timing straps, some charge big fees and get them. --scryptr