About the 2 GB DIMM for Xserve G5
The 2 GB DIMM is offered as a configure-to-order option for Xserve G5. The DIMM is a special high-density design, engineered to be industry compatible and deliver 2 GB-per-DIMM capacity at full PC3200 performance. The DIMM supports error correction code (ECC) and like all memory installed in Xserve G5, it must be installed in matching pairs.
All Xserve G5s that are ordered with any 2 GB DIMM option use a different logic board that provides hardware support for up to 16 GB of RAM. You can only install 2 GB DIMMs in logic boards that specifically support it.
How to determine if your main logic board supports 2 GB DIMMs
Xserve G5 main logic boards that support 2 GB DIMMs will either have a "DDR 2GB" label affixed between the PCI expansion slots and the DIMM slots, or will have "DDR 2GB" imprinted on the board. See the diagram below for the exact placement.
Xserve logic boards that do not have this label do not support 2 GB DIMMs. If you install a pair of 2 GB DIMMs in an Xserve that doesn't support them, the DIMMs will not be recognized by the system and won't be utilized.
If you need to perform a main logic board replacement, be sure that the replacement board has the same level of memory support as the original one by checking for this label.
Installing 2 GB DIMMs
Along with 2 GB DIMM support, Xserve G5 continues to support 1 GB, 512 MB, and 256 MB DIMMs. Remember that all memory must be installed in matching pairs. When mixing higher density and lower density DIMMs in the same system, you may need to reconfigure your memory. Install the larger DIMMs, in pairs, from the center out.
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If extra slots are available and you want to install more memory, install additional DIMMs in pairs, one per bank, from the center outward. |
Mac OS X Server Software
For 2 GB DIMM support, Xserve G5 systems require Mac OS X Server version 10.3.7 (7T66) or later. Earlier versions of Mac OS X Server are not supported.
Xserve Remote Diagnostics and 2 GB DIMMs
Use Xserve Remote Diagnostics (XRD) version 1.0.2 or later to test Xserve G5 systems with 2 GB memory modules (DIMMs) installed. Earlier versions of the software might erroneously report memory failures. If you must run the older software, you can avoid the erroneous reports by installing 2 GB DIMMs in the inside slots and working your way outward with smaller DIMMs, as shown in the illustration above.