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Apple Notebooks Apple's notebook computers including MacBook Pro, MacBook, MacBook Air, PowerBook, and iBook.

MacBook - Second Core


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Woodsie

 
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Hi,

If you check my previous posts I asked about the dual core processor.

Well, since then I have done many sessions of hard work on all sorts of programs and sometimes the mac justs grinds to a standstill.
During these I checked to see if it was using both cores and I have never seen it running both.
Is it possible to have deactivated it somehow?
Thanks
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Derek McNelly

 
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Okay, nevermind. I just read up on it and the gist of what the dual core does is it splits up the processes evenly between the two cores.

The overall performance is somewhere around 1.6 times the listed clock speed, so a 2GHz Dual Core runs like a 3.2 GHz single core.

One of the reasons for the multiple cores is because it's getting harder to fit all the transistors onto a chip, and as such, it's easier to just make multiple cores that work together on a single die.

The best way to keep your Mac running fast is to add more RAM if you can, and if you can't, look and see what processes are running in the background and try and kill some of them.

MacBook Pro 2.3 GHz Quad i7 - 8GB RAM - 750GB HHD - OS X 10.8
MacBook 2.0 GHz Core 2 Duo - 4 GB RAM - 320 GB HDD - OS X 10.6

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What are you using to view the activity of CPU cores?

Activity Monitor in Utilities and the CPU tab will show you both cores and how much they are being used. On my Core Duo Mini both are always in use when I am doing work.
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Don't believe I've ever seen only a single CPU in use in Activity Monitor.

I cannot be held responsible for the things that come out of my mouth.
In the Windows world, most everything folks don't understand is called a virus.
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Derek McNelly

 
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So, the two graphs highlighted in red each represent a core?

MacBook Pro 2.3 GHz Quad i7 - 8GB RAM - 750GB HHD - OS X 10.8
MacBook 2.0 GHz Core 2 Duo - 4 GB RAM - 320 GB HDD - OS X 10.6

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Yes, and you can get the same on the dock icon which represents CPU history or have the dock icon set to CPU usage to show the current use only.

I cannot be held responsible for the things that come out of my mouth.
In the Windows world, most everything folks don't understand is called a virus.
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theonegod

 
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You can deactivate a single core in power management. Otherwise no.
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When I was at the Apple store last Saturday, they had a little video about the C2D processor. The cores run independently. As for deactivating a core, I've never heard of such a thing, so I can't comment.


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Woodsie

 
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Thanks guys, just checked activity monitor and there are 2 graphs working so it must be happening!

Thinking of ordering 4GB ram from macsales, that should speed things up!
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