Apple M8889LL/A User Guide - Page 56

PC2100 double-data-rate DDR Synchronous DRAM SDRAM; also described as DDR-266

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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 amounts of DRAM installed, use the Apple System Profiler (located in the Utilities folder, in your computer's Applications folder). DIMMs must fit these specifications: m PC2100 double-data-rate (DDR) Synchronous DRAM (SDRAM); also described as DDR-266 m 2.5 volt ( V ) m 64-bit wide, 184-pin module m Maximum number of memory devices on a DIMM is 16. m Unbuffered; do not use registered or buffered DRAM. m Height must not exceed 1.25 inches. 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. 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 Unplug 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.) Warning The only way to disconnect power completely is to unplug the power cord. Make sure that the cord is disconnected before removing or installing any components inside the server. 56 Chapter 5

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56
Chapter
5
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 amounts of DRAM installed, use the Apple System Profiler (located in the Utilities
folder, in your computer’s Applications folder).
DIMMs must fit these specifications:
m
PC2100 double-data-rate (DDR) Synchronous DRAM (SDRAM); also described as DDR-266
m
2.5 volt ( V )
m
64-bit wide, 184-pin module
m
Maximum number of memory devices on a DIMM is 16.
m
Unbuffered; do not use registered or buffered DRAM.
m
Height must not exceed 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
Unplug 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 disconnect power completely is to unplug the power cord.
Make sure that the cord is disconnected before removing or installing any components
inside the server.