Even better, because all the aspects of the processor can access all of the system memory, thereвЂ™s no performance hit when the graphics cores need to access something that was previously being accessed by a processor core. If it needs more memory for the Neural Engine, likewise. If the system needs more memory for graphics, it can allocate that.

The M1 processorвЂ™s memory is a single pool thatвЂ™s accessible by any portion of the processor. There have been many other Macs with soldered-on memory that couldnвЂ™t be upgraded, but this is a little different, since the memory is basically part of the M1 package itself. What this means is that when you buy an M1-based Mac and choose a memory configuration, thatвЂ™s it. Instead, the memory is integrated into the same package that contains the M1 itself. ThereвЂ™s no memory slot or slots on the motherboard of an M1 Mac, nor is there an area where a memory chip has been permanently soldered on. The biggest difference is that in the M1, the memory is a part of the M1 architecture itself. (And also, in the M1вЂ™s case, the cores that make up the Neural Engine.) But in shifting its terminology to describe a unified memory architecture, AppleвЂ™s trying to point out that the M1вЂ™s approach is a bit different. Like Intel chips with integrated graphics, the M1 chip includes a graphics processor, and system memory is shared by both processor cores and graphics cores. Welcome to the world of the Unified Memory Architecture.

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