The standards of quality for mosfets/chokes/capacitors has changed a lot in the last 7-10 years, along with digitization of VRMs providing better configuration and regulation of power delivery over old analog methods.
As such, within the current Z370 Asus lineup the Prime Z370-A actually represents the baseline of what you should be getting if you want to push overclocks. I don't see why it wouldn't be capable of a stable 5.0ghz overclock, provided your chip is capable. Beyond that could be another matter though. You'd have to move up to a real ROG board to see any significant difference.
Keep in mind the "Strix ROG" are not true ROG boards - they are a "Gaming" lineup that sits above the new budget-oriented "TUF Gaming" lineup, but still fall below real ROG. The "Prime" lineup is separate, but it looks like the Z370-P would be low-mid "Strix ROG" equivalent, with Z370-A sitting between STRIX Rog and true ROG.
I find the new naming conventions pointlessly confusing over the old Budget ---> A --> Pro --> Deluxe setup, with ROG being a separate entity and providing different featuresets and not necessarily better to the Pro/Deluxe, up until the flagship models which were "best in class" so to speak.
I'd like to see Asus publish the specific components in use though, like Asrock has. Without actually having the board and inspecting components you're left to guess based on advertising material what exactly is being used.
As such, within the current Z370 Asus lineup the Prime Z370-A actually represents the baseline of what you should be getting if you want to push overclocks. I don't see why it wouldn't be capable of a stable 5.0ghz overclock, provided your chip is capable. Beyond that could be another matter though. You'd have to move up to a real ROG board to see any significant difference.
Keep in mind the "Strix ROG" are not true ROG boards - they are a "Gaming" lineup that sits above the new budget-oriented "TUF Gaming" lineup, but still fall below real ROG. The "Prime" lineup is separate, but it looks like the Z370-P would be low-mid "Strix ROG" equivalent, with Z370-A sitting between STRIX Rog and true ROG.
I find the new naming conventions pointlessly confusing over the old Budget ---> A --> Pro --> Deluxe setup, with ROG being a separate entity and providing different featuresets and not necessarily better to the Pro/Deluxe, up until the flagship models which were "best in class" so to speak.
I'd like to see Asus publish the specific components in use though, like Asrock has. Without actually having the board and inspecting components you're left to guess based on advertising material what exactly is being used.