øÿ Power Mac G5
Memory
Replacement Instructions
Follow the instructions in this sheet carefully. Failure to follow these instructions could damage your equipment and void its warranty.
Note: Online instructions are available at http://www.info.apple.com/installparts/.
Tools Required
No tools are required for this procedure.
About Power Mac G5 Memory
Power Mac G5 (Late 2004) computers have four Dual Inline Memory Module (DIMM) slots.
Each slot accepts 400 Mhz Double-Data-Rate (DDR) Synchronous Dynamic RandomAccess Memory (SDRAM) devices.
The computers ship with a minimum of 256 MB of RAM, provided by a pair of 128 MB
DIMMs installed in the two DIMM slots marked 1. You can add DIMMs, provided they are installed as a pair of equal size, in the two DIMM slots marked 2. A diagram on the logic board near the DIMM slots illustrates how the pairs must be installed.
Rev. A
DIMMs must ût these speciûcations:
" 400 MHz DDR
" 2.5 volt
" 184-pin module
" Maximum number of memory devices on DDR SDRAM:16.
" Nonparity
" No error correcting codes (ECC)
" Unbuffered (registered or buffered DDR SDRAM cannot be used)
Important: Always install DIMMs in pairs of equal size. Memory from older Macintosh computers is not compatible with the Power Mac G5. Do not use older memory, even if it
ûts into the DIMM slots.
Opening the Computer
1. Shut down the computer.
Warning: Always shut down the computer before opening it to avoid damaging its internal components or the components you are installing. Do not open the computer or attempt to install items inside it while it is on.
2. Wait 5 to 10 minutes to allow the computer s internal components to cool.
Warning: After you shut down the system, the internal components can be very hot.
You must let the computer cool down before continuing.
3. Unplug all external cables from the computer except the power cord.
4. Touch the metal PCI access covers on the back of the computer to discharge any static electricity from your body. (Figure 1)
Important: Always discharge static before you touch any parts or install any components inside the computer. To avoid generating static electricity, do not walk around the room until you have finished working and closed the computer.
Power Mac G5 Memory - 2
