" 'desktop-level' performance"
Never gonna happen.
A desktop is plugged into the mains, a phone has a battery that has a finite - and very limited - duration.
Even if you plug the phone into a charger, it is designed for a heat envelope that is orders of magnitude less than what a true desktop - with watercooling these days - is designed for.
So go on and say that your new design is the highest performer, sure, but a desktop it ain't and never will be.