System on a chip
The M1 is, in fact, a system on a chip (SoC). It incorporates almost all the fundamental components of a computer, like the CPU, GPU, memory, USB controller, power management circuits, and wireless radios into one chip instead of them all being separately put together on a motherboard. This high level of integration means that an SoC uses much shorter wiring and, most significantly for users, requires a lot less power.
According to Apple, its new chip has a unified memory architecture that incorporates highbandwidth, low-latency memory into a single pool within a custom package. Consequently, all the technologies in the SoC can access the same data without needing to copy it between multiple pools of memory. This all contributes to improved performance and efficiency. Apple says that machines running the M1 chip offer CPU performance that is up to twice as fast at that on a PC laptop using the latest chip. The company has also stated that its devices can match peak PC performance using just 25% of the power.
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Denne historien er fra January 2021-utgaven av MacFormat UK.
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