I don't get why AMD used 3000 naming for desktop Zen 2 CPUs and 4000 for mobile CPUs.
It is a bit misleading. When I researched some laptops and saw trhey had Ryzen 7 3700U I wronly presumed they are using Zen 2 CPUs, but I've found out that 3000 series mobile CPUs are using Zen+.
Although it seems confusing it actually makes sense from a business perspective, The Mobile chips are always designed AFTER the general cpu design with laptop graphics, different thermals and a tighter market (read, older, more mature process). That's why the technology is behind a few months compared to server/desktop. But its still AMD's "newest" chip they can produce. Therefore its better to create a definitive line for the customer that the 4000 series is simply the most up-to-date chip in any market and lineup to avoid confusion.
That said, it would be nice to see a generation of fractional numbers to just re-align... 4x50H/U for the refresh, then next generation, just wait.
It's far more about marketing... 4000 is higher than 3000, but you'd have to know there are no 4000 desktop CPUs when shopping, so it still creates confusion.
It is a bit misleading. When I researched some laptops and saw trhey had Ryzen 7 3700U I wronly presumed they are using Zen 2 CPUs, but I've found out that 3000 series mobile CPUs are using Zen+.