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"Can't innovate anymore my ass!" -- Phil Schiller

Apple is definitely getting “Back to the Mac” with the announcement that it has achieved million Mountain Lion installs since launch; Tim Cook even bragged that Mountain Lion is approaching 40 percent penetration on Macs while Microsoft is struggling to meet 5 percent penetration with Windows 8.
But Mountain Lion is so last year; Apple is already working on its successor, OS X 10.9 Mavericks. Apple is moving away its "cat themed" names and is instead looking to points of interest in California to carry it through the next decade of desktop/notebook OS development.

Finder Tabs
Mavericks will of course have a ton of new features including Maps, tabbed browsing for Finder, enhanced support for multiple displays, and a big focus on improving battery life for notebooks. And although Safari isn't exactly a "sexy" piece of the OS X equation, Apple has brought a wealth of changes to the browser aimed at improving battery life and improving page rendering performance.

 Battery life enhancements (L), new features in Safari (R)

Apple also announced new MacBook Airs that have "all-day" battery life. The new MacBook Airs are built around Intel's new Haswell CPU architecture, and as a result offer 12 hours of battery (13" model) and 9 hours of battery life (11" model). The notebooks now include 802.11ac support and PCIe-based SSDs. The 11" will start at $999 with 128GB of storage while the 13" model will start at $1099 with 128GB of storage.

The biggest hardware announcement, however, came in the form of the new Mac Pro. This totally redesigned professional workstation totally throws out the rulebook when it comes to desktops with a cylindrical design.
Phil Schiller took this opportunity to exclaim, "Can't innovate anymore my ass!". This is obviously a retort to the score of people that say that Apple has lost its way.

The new Mac Pro will support up to 12-core configs of Intel's next generation Xeon processors.1866MHz DDR3 memory, PCIe flash (1.25GBps reads, 1GBps writes), six Thunderbolt 2 ports, and dual AMD FirePro workstation GPUs.
The new Mac Pro will debut this fall and will be built in the United States.

Source: Apple

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By testerguy on 6/11/2013 4:33:43 AM , Rating: 1
It's because it's a non-optimal configuration which makes airflow perpendicular to heat flow, instead of parallel to it

Um, no. The heatflow, much like the airflow, is vertically upwards.

components higher up your chimney will have less cooling because they're getting air that's been warmed up by components lower in the chimney

Have you even looked at the design on the Apple website? None of the components are 'higher up your chimney'. They are all at the same level. It's a triangular prism which is effectively a giant heat sink which connects to components on all 3 sides of the prism. This means that if any one part of the system is cooler, the thermal capacity is automatically used to cool down the hotter parts. This single heatsink has airflow parallel to the flow of heat.

Ideally you want airflow to be parallel to the flow of heat. e.g. heatsink fan sucks in air through the sides of the heatsink and blows it out the top. So the heatsink is hottest at the bottom (closest to CPU), coolest at the top. Air is coolest at the bottom, hottest at the top. That makes the heat gradient consistent across the air temperature gradient (a certain temperature air always sees the same temperature metal), providing uniform cooling.

If the air is coolest at the bottom, and hottest at the top, with the heatsink hottest at the bottom and coldest at the top, you would not see 'uniform cooling' - at all. You would see more significant cooling where the temperature gradient is highest (ie at the bottom). I think you probably meant that you would achieve a temperature at the top and the bottom which are most similar when compared to other configurations.

Anyway, the configuration you speak of is exactly what Apple has built. The CPU is near the bottom and the air is coldest at the bottom and warmest at the top.

Also, I'd need to do some calcs but my intuition says a circular shape is the worst shape for this. To maximize heat exchange, you want to maximize surface area presented to the airflow. A circular cross-section minimizes surface area encountering a given volume of airflow.

You're confusing the housing with the central triangular prism. It's the prism itself, which has numerous 'bands' to increase surface area which is the part the air will come into contact with. Each 'side' of the triangular prism is effectively the rectangular car radiator you speak of. However, it's not the rectangular nature of a car radiator which gives it the most surface area, it's the grooves.

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