Apple Xserve (Slot Load) - Manual (Page 65)

Installing or Replacing Server Components 65
Adding Memory
The server has four memory slots, at least one of which is filled at the factory. Follow these
steps to add memory to the server.
You can install additional dynamic random-access memory (DRAM) in packages called
Dual Inline Memory Modules (DIMMs) in the four DRAM DIMM slots on the server’s main
logic board. You can expand your computer’s DRAM to a maximum of 2 gigabytes (GB). To
check the amount of DRAM installed, use Apple System Profiler (in Applications/Utilities).
DIMMs must fit these specifications:
m PC2700 double-data-rate (DDR) Synchronous DRAM (SDRAM), also known as DDR-333
m 2.5 volt ( V )
m 64-bit wide, 184-pin module
m 16 memory devices maximum
m Unbuffered (not registered or buffered)
m Maximum height of 1.25 inches
Note: When purchasing DRAM for use in the server, make sure that the memory conforms
to the JEDEC specification. Check with your memory vendor to ensure that the DRAM DIMM
supports the correct timing modes and that the Serial Presence Detect (SPD) feature has
been programmed properly, as described in the JEDEC specification. You can purchase
memory where you bought your server.
Follow these steps to install memory in the server.
1 Shut down the server.
Be sure to alert users of the server that it will be unavailable for a period of time.
2 Disconnect the power cord from the back panel of the server. (If the cable-management arm
is not attached, you also need to disconnect cables from the back panel.)
Important DIMMs from older Macintosh computers are not compatible with your server.
Do not use older DIMMs even if they fit into the DIMM slots.
Warning The only way to shut off power completely is to unplug the power cord. Make
sure that the cord is disconnected before removing or installing any components inside
the server.