But its not all about miners, you build a high end system, you spend a lot of money and time over clocking the CPU to get a stable over clock. its water cooled with the rads and fans cooling it. GPU could well be at idle while surfing but you don't reduce your stable 24/7 over clock to surf, makes no sense to keep going into the bios to do so.
a big PSU to power it all when you do game, even if only an hour a day and the rest of the time reading forums or driver update's. I had this system, some times i never gamed for days even weeks. 5950X overclocked, 3090 dual 480 rads, push and pull fans a great system but power efficient it was not.
Today a Mac mini 6 core, dual thunderbolt drives on one TB chip with EGPu on the other, one TB drive with win 11 the other OSX Monterey. DVI out for surfing, EGPu for gaming in windows. when surfing DVI out efficient little mac mini EGPu switched off. When doing video editing i will
switch on my Mac pro. 16 core 96g ram perfect, also with windows in bootcamp again i can game if i want via that. but mostly its for my work with video. surfing its Mac mini DVI out. power use efficient for what i am doing at that time.
Its not even about hardware cost, as we know Apple charge a lot, its about being efficient and not wasting power just because you can afford it. my children and my gran children will pick up the cost after most of us are dead in the environment they have to live with.