Apple M9032LL User Guide - Page 81

Power Supply, Power Requirements for Devices You Can Connect, System Clock and Battery

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 Signal-to-noise ratio: Greater than 90 dB  Total harmonic distortion: Less than -85 dB (0.006 percent)  Channel separation: Greater than 75 dB Analog audio line-out  Output voltage: 1.4 Vrms (+4 dBµ)  Output impedance: 24 ohms  Signal-to-noise ratio: Greater than 90 dB  Total harmonic distortion: Less than -80 dB (0.01 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 amperes (A) (low voltage range) or 6 A (high voltage range)  Frequency: 50-60 Hz DC display output Dependent on video card Power Requirements for Devices You Can Connect Expansion cards Combined maximum power consumption for all four PCI Express slots should not exceed 200 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 37.5 W total to the FireWire ports. System Clock and Battery Your computer has CMOS custom circuitry with a long-life battery. Battery Use a 3 V, CR 2032 Lithium coin cell replacement battery (see "Replacing the Internal Backup Battery" on page 68). Appendix A Specifications 81

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Appendix A
Specifications
81
Â
Signal-to-noise ratio:
Greater than 90 dB
Â
Total harmonic distortion:
Less than -85 dB (0.006 percent)
Â
Channel separation:
Greater than 75 dB
Analog audio line-out
Â
Output voltage:
1.4 V
rms
(+4 dBµ)
Â
Output impedance:
24 ohms
Â
Signal-to-noise ratio:
Greater than 90 dB
Â
Total harmonic distortion:
Less than -80 dB (0.01 percent)
Â
Channel separation:
Greater than 65 dB
Power Supply
AC line input
Â
Voltage ranges:
100–120 V alternating current (AC) and 200–240 VAC
Â
Current:
Maximum of 12 amperes (A) (low voltage range) or 6 A (high voltage range)
Â
Frequency:
50–60 Hz
DC display output
Dependent on video card
Power Requirements for Devices You Can Connect
Expansion cards
Combined maximum power consumption for all four PCI Express slots should not
exceed 200 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 37.5 W total to the FireWire ports.
System Clock and Battery
Your computer has CMOS custom circuitry with a long-life battery.
Battery
Use a 3 V, CR 2032 Lithium coin cell replacement battery (see “Replacing the Internal
Backup Battery” on page 68).