Working Inside the Server 33
DRAM Configurations
Your computer’s DRAM can be expanded to a maximum of 1024 MB by adding DIMMs to the
four DRAM DIMM slots on the main logic board.
DIMMs must fit these specifications:
m “PC-100” Synchronous DRAM (SDRAM)
m 3.3 volts (V)
m 64-bit wide, 168-pin module
m Maximum number of memory devices on DIMM is 16.
m Unbuffered; do not use registered or buffered Synchronous DRAM (SDRAM).
m Not more than 2.0 inches high
Note: Different size DRAM DIMMs can be installed in any order in any DIMM slot. Unlike
older Macintosh computers, DIMMs need not be installed in pairs.
To increase DRAM to the maximum of 1024 MB, fill all four slots with 256 MB DIMMs. Any
256 MB DIMMs you install must use 128 megabit (Mbit) device technology. Your computer
requires at least one DIMM to operate.
For instructions on installing DRAM, see the section “Installing DRAM” on page 40.
About Internal Storage Options
Your Macintosh has four internal drives. Two hard disks occupy two positions on the lower
drive carrier, and a CD-ROM drive fills the upper bay. The lower drive carrier can
accommodate one additional hard disk drive.
For technical information about the power requirements for devices the computer can
accommodate, see the Technical Information booklet that came with the computer.
Important This computer uses SDRAM DIMMs. DIMMs from older Macintosh computers
are not compatible with your computer and should not be used even though they fit into the
DRAM DIMM slots.
