Optical drives
Your Mac Pro comes with one or two DVD+R
Hard disk drive
Your Mac Pro comes with up to four hard disk drives installed in the drive carriers. To install or replace the hard disk drives, see ÒInstalling Internal Storage DevicesÓ on page 38.
PCI Express slots
Your Mac Pro has three PCI Express expansion slots. To install PCI cards in slots 2 through 4 to expand your computerÕs capabilities, see ÒAdding PCI Express CardsÓ on page 47.
Battery
Your Mac Pro uses an internal backup battery. If your Mac Pro has trouble starting up, or if the system date and time are frequently incorrect, you may need to replace the battery. See ÒReplacing the Internal Backup BatteryÓ on page 50.
Double-wide PCI Express graphics slot
Connect up to two displays to the graphics card in the PCI Express graphics slot (slot 1). You can replace the card in this slot and install additional graphics cards in PCI slots 2 through 4. See ÒAdding PCI Express CardsÓ on page 47.
Memory cards
Your Mac Pro has two memory cards. Each card holds up to 4
Chapter 2 Getting to Know Your Mac Pro
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