What follows in pure speculation and in no way are these figures listed as proof or actual numbers. They are merely presented as proofs of concept and in no way should be taken as exact figures. I'm guessing at numbers, but only assuming on the decisions made here. There is no proof that anything listed below actually happened. AGAIN, THIS IS ONLY A PROOF OF CONCEPT.
I look at it this way. Overclocking use to be a niche regime. Only a few people actually knew what it was and how to do it; and when I say "a few", I'm talking in the area of tens of thousands. The problem for overclockers was that word was getting out and more and more people were wanting to get into it; most without even bothering to learn what it meant or the consequences. They just heard "Free performance increase" and went all in.
The part you need to figure out is at what point do Intel, AMD, and motherboard manufacturers decide it's profitable to make the designation between chips, advertise it, and take the market away from that original niche crowd? Because, that's exactly what happened.
Back in the Pentium 4 phase of Intel chip processing, there were no differences in chip naming. It was a Pentium chip or it wasn't. There was no such thing as a P4K chip. All chips had the capability of being overclocked; some a great deal, some, only a tiny bit, if at all. Back then, that wasn't Intel's concern. As long as they all performed at their base speeds, it was good enough.
But the overclocking market grew and Intel found an opportunity. Some marketing genius over at Intel figured out, "Hey! We don't need to guarantee a specific overclock, but we can market it as an overclock capable processor, and charge a higher price!" They're getting the same product. We're just charging them more. Then, to keep the original niche market from destroying the market we stole from them, we'll introduce artificial limits on our processors, so our non-overclock processors cannot be overclocked at all and hence the "K" vs "Non-K" processor market was born.
Motherboard manufacturers soon followed suit and created the "H" vs "Z" chipset market (though not likely the first iteration).
Again, it all boils down to at what point does it become profitable for chip manufacturers. Fact of the matter is there are several billion home computers in use on the planet today. The vast majority of those computers are prebuilt computers (I'd say somewhere in the high ninetieth percentile). However, that still leaves several dozens of millions of computers that are being built at home. I would say, probably less than half of those (but growing) actively overclock.
-Wolf sends