PowerBooks & iBooks

15″ hi-res PowerBook G4 (Late 2005)

15" aluminum PowerBook G4The new 15" PowerBook looks just like the old one - until you look at the screen. From April 2002 until now, 15" 'Books have had 1280 x 854 display. The October 2005 model boosts that to 1440 x 960, the same resolution common on many 15" widescreen Windows laptops.

Apple has eliminated the lower-cost PowerBook G4, which ran at 1.5 GHz and had a Combo drive; the Combo drive is now a build-to-order option. The new 15" PowerBook G4 HR (for high resolution) comes with a dual-layer 8x SuperDrive. As before, it includes Apple's backlit keyboard and supports Dual-Link DVI (previously a $100 build-to-order option).

Bluetooth 2.0 (up to 3x faster than the old standard) and AirPort Extreme are standard features. The use of DDR2 memory will probably improve performance.

Battery life is rated at 5.5 hours, an hour longer than earlier models.

Closed Lid Mode: G4 PowerBooks support "lid closed" (or clamshell) mode, which leaves the built-in display off and dedicates all video RAM to an external display. To used closed lid mode, your 'Book must be plugged into the AC adapter and connected to an external display and a USB or Bluetooth mouse and keyboard (you might also want to consider external speakers). Power up your 'Book until the desktop appears on the external display and then close the lid. Your 'Book will go to sleep, but you can wake it by moving the mouse or using the keyboard. The built-in display will remain off, and the external monitor will become your only display. Since all video RAM is now dedicated to the external monitor, you may have more colors available at higher resolutions. The TiBook is designed to run safely in closed lid mode, but if yours runs hot (perhaps due to overclocking or high ambient temperatures), you may want to open the lid when in closed lid mode: The screen will remain off and the computer will more readily vent heat from the CPU.

To resume use of the internal display, you need to disconnect the external display, put the computer to sleep, and then open the lid. This will wake up your 'Book and restore use of the built-in display.

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