4 ms·

HSA has been a thing since 2015: https://en.m.wikipedia.org/wiki/Heterogeneous_System_Architecture https://en.m.wikipedia.org/wiki/Heterogeneous_System_Archite

• mrgordon 6y ago
  Sure but Intel doesn't support it right so it wasn't in use for MacBooks as far as I understand. I'm not saying Apple invented the concept but they implemented it in their laptops for the first time so you logically wouldn't need as much RAM for many use cases where you can share memory that you couldn't share before.
• _kbh_ 6y ago
  Yeah but there hasn't been the level of vertical integration that the M1 laptop has before. The same company is building the silicon, the laptop and the OS they can leverage whatever they feel like and don't have to account for processors that have differing features.