John Siracusa

The M5 is all one die.

It does not use this chiplet, you know, Apple Fusion architecture.

So the M5 one is different, like physically different, manufactured in a different way than the M5 Pro and M5 Max.

So there is a bifurcation in the line.

Whole M5 line has these super cores, which fine is a renaming of the most powerful cores, but the M5 has the efficiency cores that presumably are similar to the efficiency cores in the M4 line.

And the M5 Pro and M5 Max have essentially better efficiency cores, which are bigger and more powerful, and they're called performance cores.

It's Apple...

They really messed up the naming, but what they're going for is name different things differently.

Now, there is an argument to be made that across the M1, M2, and M3, they kept calling them efficiency cores.

Obviously, the efficiency cores change.

The M1 efficiency core is not the same as the M4 efficiency core.

We just kept calling them efficiency cores, but we always understood within the context of the M whatever line, these are the efficiency cores.

Now with the M5 generation, there's two different kinds of efficiency cores.

And as Jason Snell pointed out,

every time you talk to an Apple executive for years and at WWDC, they would say this, like I've, I've heard people say this to me in person, literally, uh, you know, this is efficiency cores are actually pretty good.

It's like Apple, you name them efficiency cores.

If you don't like people calling them that, because they were like, Oh, I want to be on the power cores.

Like in every WWDC session where that shows you how do you use like core affinity and stuff like that.

They're like, and don't be afraid to use the efficiency cores.

They're actually really powerful.