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Question What do M1 desktops do with small CPU cores?

Vegasus

Member
Jul 27, 2016
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The M1 chip has big and small CPU cores. In a battery powered device, the small cores are useful for extending battery life when the device isn't doing much, but what do they do in a desktop? Allow the device to be slightly thinner? Save a few pennies per year off the electric bill?
 

TheStu

Moderator<br>Mobile Devices & Gadgets
Moderator
Sep 15, 2004
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In MacOS Big Sur, almost all background tasks are shunted to the Efficiency cores, so when it comes time to do something more serious, the High Performance cores kick in and everything feels faster. The Efficiency cores handle the little stuff, which is valuable from a Quality of Service standpoint, because it makes the rest of the system feel more responsive.
 

Justinus

Platinum Member
Oct 10, 2005
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In MacOS Big Sur, almost all background tasks are shunted to the Efficiency cores, so when it comes time to do something more serious, the High Performance cores kick in and everything feels faster. The Efficiency cores handle the little stuff, which is valuable from a Quality of Service standpoint, because it makes the rest of the system feel more responsive.
But on desktop, they could just have more big cores....
 

TheStu

Moderator<br>Mobile Devices & Gadgets
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Sep 15, 2004
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But on desktop, they could just have more big cores....
1: Having the background tasks managed by the efficiency cores means the fans kick on less frequently (beneficial), and more demanding tasks launch quicker and are more responsive (again, beneficial)
2: That will almost certainly happen, but the way M1 was designed doesn't allow for that.
 

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