MacBook 1.3Ghz @ 1.2Ghz

[sakabaro]

Just got the new macbook CTO 1.3Ghz. Everything indicates a 1.3Ghz CPU apart when I run:

sysctl -n machdep.cpu.brand_strin

I am getting:

Intel(R) Core(TM) M-5Y71 CPU @ 1.20GHz

Any explanation?

 

[zhenya]

Well, the 1.3 chips I believe are from the same line as the 1.2 chips, but the ones that 'binned' a bit higher, and as such are capable of being run a bit faster. So at the core, they may be identified as the same chip.

 

[surroundfan]

Running sysctl -n machdep.cpu.brand_string the 1.1GHz is actually a 900MHz processor by that!

It's tempting to say that 2003 wants its processor speeds back but I suspect that it's just that this is the minimum clock speed it can run or something like that...

https://en.wikipedia.org/wiki/List_of_Intel_Core_M_microprocessors

 

[cbautis2]

Intel allowed configurable TDP and base clock rate (based on TDP) on the Core M. On some Windoze laptops, Core M 5Y71 is configured to 1.4 GHz base with 6 W TDP.

 

[sakabaro]

That's weird.

Can people post here the result of the `sysctl -n machdep.cpu.brand_strin` here for their MB? (Just go to the terminal and copy/paste it.) Thanks!

 

[MyopicPaideia]

It is just telling you the base clock of the part number. 5Y71 has a base clock of 1.2, the 5Y51 a base clock of 1.1, and the 5Y31 0.9.

Apple is overclocking all three of these processors to a different degree but the command you are running just returns the part number, it doesn't reflect any overclocking...

So it really isn't that weird at all.

 

[MyopicPaideia]

Well, the 1.3 chips I believe are from the same line as the 1.2 chips, but the ones that 'binned' a bit higher, and as such are capable of being run a bit faster. So at the core, they may be identified as the same chip.

Nope different part numbers, see above.

 

[sakabaro]

Cool, thanks, don't really get why Apple doesn't stick to the part name in their product description, but whatever I guess.

 

[MyopicPaideia]

Cool, thanks, don't really get why Apple doesn't stick to the part name in their product description, but whatever I guess.

Yeah, it isn't Apple that decides what string the Intel processor returns for that command. And it is accurate in any case...

 

[Gav2k]

It is just telling you the base clock of the part number. 5Y71 has a base clock of 1.2, the 5Y51 a base clock of 1.1, and the 5Y31 0.9.

Apple is overclocking all three of these processors to a different degree but the command you are running just returns the part number, it doesn't reflect any overclocking...

So it really isn't that weird at all.

There is no 'over clocking' taking place. The base clock has a range and apples between the min/max figure for the chips specifications

 

[MyopicPaideia]

There is no 'over clocking' taking place. The base clock has a range and apples between the min/max figure for the chips specifications

Ok, "up" clocking then.

 

[jerwin]

That's weird.

Can people post here the result of the `sysctl -n machdep.cpu.brand_strin` here for their MB? (Just go to the terminal and copy/paste it.) Thanks!

should't that be

sysctl -n machdep.cpu.brand_string

?