Apple MC561LL/A ユーザーズマニュアル
112
Chapter 5
What’s Under the Hood
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Total harmonic distortion + noise: Less than -60 dB (0.1 percent)
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Frequency response: 100 Hz to 8.2 kHz, +0.5 dB/-3 dB
Power Supply
AC line input
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Voltage ranges: 100–240 V alternating current (AC)
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Current: Maximum of 12 A (low voltage range) or 5 A (high voltage range)
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Frequency: 50–60 Hz single phase
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).
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.
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.
The computer can provide up to 28 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-volt, BR 2032 lithium coin cell replacement battery (see “Replacing the Internal
Backup Battery” on page 79).
Use a 3-volt, BR 2032 lithium coin cell replacement battery (see “Replacing the Internal
Backup Battery” on page 79).