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Appendix A Specifications 75
Analog audio line out (typical values)
Based on a typical situation with playback of 1 kHz, -3dBFS 24-bit sine wave, 44.1 kHz
output sample rate into 100 kilo-ohms unless otherwise specified below.
 Output voltage: 1.6 V
rms
(+6.3 dBµ)
 Output impedance: 24 ohms
 Signal-to-noise ratio: Greater than 90 dB
 Total harmonic distortion + noise: Less than -85 dB (.01 percent)
 Channel separation: Greater than 65 dB
Power Supply
AC line input
 Voltage ranges: 100–120 V alternating current (AC) and 200–240 VAC
 Current: Maximum of 12 A (low voltage range) or 6 A (high voltage range)
 Frequency: 50–60 Hz
Power Requirements for Expansion Cards and Peripherals
Expansion cards
Combined maximum power consumption for all four PCI Express slots should not
exceed 300 watts (W).
USB devices
Each of the computer’s built-in USB ports is allotted 500 mA.
FireWire devices
The computer can provide up to 28 W total to the FireWire ports.