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Chapter 2 Getting to Know Your Mac Pro 23
Optical drives
Your Mac Pro comes with one or two DVD+R DL/DVD±RW/CD-RW SuperDrives in the
optical drive carrier. To replace an optical drive, see “Replacing the Optical Drive” on
page 42.
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 “Installing Internal Storage Devices” 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 computer’s capabilities, see “Adding PCI Express Cards” 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 “Replacing the Internal Backup Battery” 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 “Adding PCI Express Cards” on page 47.
Memory cards
Your Mac Pro has two memory cards. Each card holds up to 4 FB-DIMMS, for a total of 8
DIMMs. To add more memory, install 667MHz FB-DIMMs in pairs on the memory cards.
See “Installing Memory” on page 32 for information about the specific type of memory
used in Mac Pro.