Specifications

Note: For best results, equipment plugged into the headphone jack should not connect the audio

ground to other grounds, such as the chassis or "green wire" ground.

Based on a 1 kHz sine wave playback, 24-bit 44.1 kHz output format, -3 dB output level and 100 kilohm load

no weighting (unless otherwise specified), the headphone output has the following electrical characteristics

(nominal specifications):

●

output voltage (full-scale output): 1.4 Vrms, (+5.1 dBu)

●

output impedance: <50 ohms

●

bits per sample: 16-bit or 24-bit

●

channel separation: > 60 dB

●

frequency response: 20 Hz to 20 kHz, +0.5 dB/–3.0 dB

●

THD+N (total harmonic distortion plus noise): < –75dB (0.017%) no weighting

Video Monitor Ports

Table 3-8 provides the port definitions of the supported graphics cards.

Table 3-8 Supported Video Cards and Ports

Port 2Port 1Graphics IC

single-link DVIsingle-link DVI TV outATI Radeon 9600

dual-link DVIsingle-link DVI TV outATI Radeon 9650

dual-link DVI TV outdual-link DVI TV outNVIDIA GeForce 6800 Ultra DDL (build-to-order)

Single-link DVI ports support 23-inch Apple Cinema displays at 1920x1200. Dual-link DVI ports support 30-inch

Apple Cinema HD displays at 2560x1600. All ports support a 32-bit resolution of 2048x1536 at 85 Hz.

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

on PCI expansion, refer to PCI or PCI-X Expansion Slots (page 62). For information on video SDRAM and power,

refer to Table 2-1 (page 28).

All of the graphics cards support dual displays in either extended desktop or video mirroring mode; for more

detail, see Dual Display Extended and Mirror Modes (page 56).

The following sections describe the video connectors on the graphics cards.

Input and Output Devices

Video Monitor Ports