9

The full spec for the 2017 12" MacBook is an i7 Kaby Lake cpu with 1.4 GHz base frequency and Turbo up to 3.6 GHz.

Various articles on the web state that the i7 used is specifically this model:

Intel i7-7Y75

Looking this up on Intel Ark shows the base frequency as 1.3 GHz.

Why is the stated base frequency on Apple's website higher than the one in Intel Ark? Does Apple use a factory overclock on the i7's in their MacBooks?

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    the apple's official statement is trustful. – aircraft Jun 26 '17 at 10:00
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The key phrase that you alluded to was

"...shows the base frequency as 1.3GHz"

(emphasis mine).

From the Intel Ark spec sheet link you provided

Processor Base Frequency

Processor Base Frequency describes the rate at which the processor's transistors open and close. The processor base frequency is the operating point where TDP is defined. Frequency is measured in gigahertz (GHz), or billion cycles per second.

(TDP is Thermal Design Power - or the wattage it dissipates with all cores running at normal operating frequency - the "baseline" if you will)

A little bit further in the Specs you will find the following values:

Configurable TDP-up Frequency           1.60 GHz
Configurable TDP-up                     7W
Configurable TDP-down Frequency         600 MHz
Configurable TDP-down                   3.5 W

What this is telling us is that the CPU can be configured up or down by tweaking the speed and TDP values. It can go up to 1.6 GHz (1.4GHz is within this limit) or down to 600 MHz. More speed, more heat, more power consumption; less speed, less heat, less power consumption. It's up to the integrator to decide what makes most sense for them.

Apple made the decision to tweak it to 1.4 GHz.

2

On desktop, Hyper-threading is a feature of i7. In the low-power laptop segment, they i7/i5 naming is mostly marketing. So the i7-7200 is just a bit lower clocked version of th i7-7600. Here a overview on Wikipedia

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    Yes, even more so since the previous m5 and m7 are now also called i5 and i7 with Kaby Lake. But while interesting, that doesn't really answer the question. – Wilbert Jun 26 '17 at 14:27
1

Intel allows OEMs to tweak the processors they use if they wish to do so, which Apple has been known to do. Apple's i5s for example, are the only i5s I know of which support Hyper-threading, normally a feature of an i7. You can't go off of Intel's specs.

  • 1
    You can go off of Intel's specs, you just need to read them like Allan did. – Nick T Jun 26 '17 at 23:17

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