AnandTech review of new MacBook


Always excellent deep reviews from AnandTech bring up some of the key tradeoffs of the new MacBook design.

Ryan Smith for AnandTech:

From an end-user standpoint then the focus on the MacBook is going to be on its size, especially its thinness. It's how Apple is choosing to promote it and it's by far the laptop's most distinctive attribute. At the same time however is the story of how Apple got to this point, and what trade-offs and sacrifices they had to make to get a laptop into this form factor. The laws of physics enforce a pretty clear trade-off between size and performance, so in creating the MacBook Apple has not only created a new size category of Macs, but a new performance category as well. It's smaller than even the MacBook Air, but it also follows a different performance curve, and ultimately is targeted at a somewhat different user base than the now-traditional ultrabook.


The new MacBook has a retina display, is thinner, and lighter than the MacBook Air, but also manages to do this about relatively similar battery life. Something has to give here and that is with the low-energy Intel Core M processor power management.

Ideally Core M will spend very little time at its base clockspeeds, and will instead be turboing up to 2.4GHz, 2.6GHz, or 2.9GHz respectively. This vast divide between the base and turbo clocks reflects the performance-bursty nature of the Core M design, but it is also why the base clockspeeds that Apple advertises can be deceptively low. In light workloads where Core M can quickly reach its top speeds to complete a task, a 2.4GHz+ Core architecture processor is nothing short of zippy. However in sustained workloads these base clockspeeds become much more relevant, as Core M has to pull back to lower clockspeeds to keep heat and power consumption under control.