No matter how many LEDs Alienware puts on the outside of its cases or how well Velocity Micro routes its internal cables, no Windows-based PC can compare to the sheer economy and innovation involved in the design of the Apple Mac Pro. The exterior is largely unchanged from that of the Power Mac G5, maintaining the same "cheese grater" appearance on the front and rear panels and the same brushed aluminum on the sides, the top, and the bottom. Key differences on the Mac Pro's front panel include an added optical-drive slot, an extra USB 2.0 port, and a FireWire 800 jack. The latter particularly benefits designers who move their work between machines via external hard drives, since the faster, easy-to-access FireWire 800 input can transmit data more quickly than USB 2.0 or standard FireWire 400.
The back panel of the Mac Pro also has a different layout than that of the Power Mac G5, but the changes are more a function of the internal design, which is one of the most exciting things about this system. The Power Mac G5 wowed people with its clean interior. The Mac Pro's internals are better because they're more than just clean--they introduce new ideas about how to best build a PC.
![]() On the left, a hard drive fitted with its mounting bracket; on the right, one of the memory mounting cards. (Click for larger image) |
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The Mac Pro also has a new mechanism for adding and removing system memory. Instead of requiring you to reach into the system and wade through overhanging cables to get to the memory slots, the Mac Pro has two removable circuit boards, each of which features four memory slots. These cards fit a little more snugly than the hard drive brackets, but they require only about as much pressure to reseat as a typical PC expansion card. This system eliminates the need to lay the Mac Pro down on its side to swap memory in and out, which is useful because you don't always have that much work space available, particularly with a system of this size.
We have a minor beef with the removable memory trays, in that they make the problem of installing the memory in the correct order a little more complicated. Put your sticks in the wrong slots, and you'll throttle your memory bandwidth. The Mac Pro's side panel has a diagram that attempts to explain the proper order to use, but the instructions could be a little more intuitive. We'd also wager that it won't occur to many users to realize that the order makes a difference.
For further expansion, the Mac Pro comes with four x16 PCI Express slots. The advantage here is that the x16 slots can accommodate all types of PCI Express cards: x16, x4, and x1. This doesn't mean that you can double up on 3D graphics power the way Nvidia's SLI and ATI's CrossFire technologies allow on high-end gaming boxes, but what you can do is stick in four graphics cards and output to up to eight different displays. That capability could be of benefit to designers, desktop publishers, people in the finance industry, and anyone else who wants more screen real estate than a single display affords.
The optical drive cage is a removable box in the upper-left corner of the system into which you can fit up to two optical drives. Unlike with the hard drives, you still need to wrangle with cables, but with the cage in place they're kept away from the rest of the system.
As for the CPUs, Apple has mounted a metal casing over them that's not easy to remove. This doesn't invite making your own processor upgrades, but the team at PowerMax showed that the processor casing can be removed, proving that DIY CPU upgrades are a possibility.
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