Apple MB535LL User Guide - Page 75

Power Supply, Power Requirements for Expansion Cards and Peripherals

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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 kilohms unless otherwise specified below.  Output voltage: 1.6 Vrms (+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 90 dB Power Supply AC line input  Voltage ranges: 100-240 V alternating current (AC)  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. Appendix A Specifications 75

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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 kilohms unless otherwise specified below.
Â
Output voltage:
1.6 V
rms
(+6.3 dBμ)
Â
Output impedance:
24 ohms
Â
Signal-to-noise ratio:
Greater than 90 dB
Â
Total harmonic distortion + noise:
Less than -85 dB (.01 percent)
Â
Channel separation:
Greater than 90 dB
Power Supply
AC line input
Â
Voltage ranges:
100–240 V alternating current (AC)
Â
Current:
Maximum of 12 A (low voltage range) or 6 A (high voltage range)
Â
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.