Specifications

For more detail on the audio, see Audio (page 46).

Power Controller

The power management controller in the Power Mac G5 computer is a microcontroller called the PMU99. It

supports new modes of power management that provide significantly lower power consumption than earlier

systems. The Power Mac G5 also utilizes a service processor unit and a fan controller unit (refer to Fan

Controller (page 29)).

For more information on power management strategy, see Power Management (page 14).

Graphics Cards

The Power Mac G5 comes with a high-performance AGP graphics card with DDR SDRAM memory. Table 2-1

lists the supported graphics cards, video memory, and power.

Table 2-1 Graphics Cards SDRAM and Power

PCI power availablePower usageVideo SDRAMGraphics IC

75 W15W128 MBATI Radeon 9600

75 W15 W256 MBATI Radeon 9650

30 W105 W256 MBNVIDIA GeForce 6800 Ultra DDL

(build-to-order)

The build-to-order GeForce 6800 Ultra DDL occupies both the AGP slot and the adjacent PCI slot. For information

on PCI expansion slots, refer to PCI or PCI-X Expansion Slots (page 22).

All graphics cards support dual displays in either extended desktop or video mirroring mode, and the dual-link

cards support a 30” Apple Cinema HD display at digital resolutions up to 2560x1600 pixels and analog resolutions

up to 1600x1200 pixels. For information about the graphics cards’ ports and modes, see Video Monitor

Ports (page 51).

The display memory on the AGP card is separate from the main memory. The display memory consists of 128

MB or 256 MB of DDR devices configured to make a 128-bit data bus. The display memory cannot be expanded

by the user.

Architecture

Graphics Cards