Apple MD771LL/A manual 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.

åOutput voltage: 1.6 Vrms (+6.3 dBµ)

åOutput impedance: 24 ohms

åSignal-to-noise ratio: Greater than 90 dB

åTotal harmonic distortion + noise: Less than -85 dB (.01 percent)

åChannel separation: Greater than 90 dB

Power Supply

AC line input

åVoltage ranges: 100Ð240 V alternating current (AC)

åCurrent: Maximum of 12 A (low voltage range) or 6 A (high voltage range)

åFrequency: 50Ð60 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 computerÕs 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

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Contents User’s Guide Page Contents Index Regulatory Compliance InformationGetting Started Setting Up Your Mac ProPosition your computer and display Plug in the power cord Connect the display Port Connect the keyboard and mouse Connect an Ethernet cablePlug the mouse into a USB port on the keyboard KeyboardMouse Turn on your Mac Pro Need Help Setting Up?Using a Wireless Keyboard and Mouse Use Setup AssistantPutting Your Mac Pro to Sleep Putting Your Mac Pro to Sleep or Shutting It DownTo wake your computer from sleep, do one of the following Shutting Down Your Mac ProGetting the Latest Information Getting to Know Your Mac ProBasic Features on the Front of Your Mac Pro FireWire 400 and 800 ports Ports and Connectors on the Back of Your Mac Pro Power socket More Ports and Connectors on the Back PCI Express expansion slots Internal Expansion Options Optical drives Getting Answers More InformationTo open Mac Help Open System Preferences by choosing Apple S ystem Page Working Inside Your Computer Opening the Computer Unplug all the cables and the power cord from the computer Lift the latch while holding the side panel Remove the side panel Installing Memory To install memory Top memory card Working Inside Your Computer Place the side panel in the slot and then push to close Push the latch down to secure the side panel Installing Sata 3 Gbit/s Hard Disk Drives Installing Internal Storage DevicesTo install a hard disk drive Position the connectors towards the rear Replace the side panel and push the latch down to secure it To replace the optical drive Replacing the Optical DriveWorking Inside Your Computer Four extra screws Power cable middle connector Ribbon cable end connector Replace the side panel and push the latch down to secure it To install a PCI Express card Adding PCI Express CardsAbout PCI Express Cards Port access cover Port access opening PCI Express slot Did You Know?-Installing a Full-Length PCI CardTo replace the battery Replacing the Internal Backup BatteryWorking Inside Your Computer Page Computer won’t respond or the pointer won’t move Problems with Your Mac ProComputer won’t turn on or start up You are unable to eject a disc If that doesn’t workStatus light flashes and the computer won’t start up Problems with Software You have a problem with a software programTo force an application to quit Problems with AirPort Wireless Communication To check for updated softwareKeeping Your Software Up to Date No image appears on the screen Problems with Your DisplayScreen image appears dim or flickers After you change the screen resolution, desktop icons moveLight on the front of the display is flashing Problems with Your Internet ConnectionTo use Network Diagnostics Screen freezesPPPoE Connections Turn the modem off and on to reset the modem hardwareCheck System Preferences settings Cable Modem, DSL, and LAN Internet ConnectionsNetwork Connections To use Apple Hardware Test Using Apple Hardware TestTo install Mac OS Reinstalling the Software That Came with Your ComputerInstalling Mac OS Installing ApplicationsMaximizing Ethernet Performance Apple Hardware Test Learning More, Service, and SupportOnline Resources Onscreen Help System ProfilerCountry Phone Website AppleCare Service and Support InformationLocating Your Serial Number Appendix Processor and Memory SpecificationsRandom-access memory RAM ProcessorData formats SuperDrive DVD+R DL/DVD±RW/CD-RW SpecificationsGraphics Card Video Display ModesFireWire Specifications USB SpecificationsEthernet Specifications Bluetooth 2.0+EDR Specifications OptionalPower Optical digital audio out AirPort Extreme Specifications OptionalOptical Digital Audio Specifications CompatibilityAnalog Audio Specifications Analog audio out using the headphone jack typical valuesAnalog audio line in typical values Power Requirements for Expansion Cards and Peripherals Power SupplyDimensions System Clock and BatteryDimensions and Operating Environment BatterySafety, Maintenance, and Ergonomics Apple and the Environment General MaintenanceTo maintain your display and ensure its long life Protecting Your Optical DriveMaintaining Your Display To keep your optical drive working properlyImportant Ergonomic and Health-Related Information Forearms and hands in a straight line Avoid Hearing Damage Compliance Statement Wireless Radio Use Korea Mouse Statement Apple and the Environment Disposal and Recycling Information Taiwan European Union-Disposal Information Page Index Index