Apple Xserve DIY Procedure for FB-DIMM Memory User Manual

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Xserve (Late 2006/Early 2008)

FB-DIMM Memory

Replacement Instructions

Follow the instructions in this document carefully. Failure to follow these instructions could damage your equipment and void its warranty.

Online instructions are available at http://www.apple.com/support/diy/.

Memory Overview

The server has 8 memory slots. The systems come with at least 1 gigabyte (GB) of memory on two fully-buffered dual inline memory modules (FB-DIMMs).To improve performance and capacity, you can install additional DIMMs for a total of up to 32 GB of memory.The eight memory slots are labeled DIMM 1 through DIMM 8.

You can use the following memory in the server:

667 MHz DDR2 ECC FB-DIMMs

512 MB, 1 GB, 2 GB, or 4 GB in matching pairs (optimal, 4 or 8 identical DIMMs)

36 devices per DIMM, maximum

Error-correcting code (ECC)

Important: Apple recommends that you use Apple-approved FB-DIMMS. Other FB-DIMMs might degrade the performance of the Xserve. DIMMs from older Xserve systems are not compatible with this Xserve.

Note: Before you purchase DIMMs other than those recommended by Apple, make sure that the memory manufacturer conforms to the Joint Electronic Device Engineering Council (JEDEC)

073-1086 Rev. B

Apple Xserve DIY Procedure for FB-DIMM Memory User Manual

specification. Make sure that the DIMMs support the correct timing modes and that the Serial Presence Detect (SPD) feature has been implemented in accordance with the JEDEC specification. To check DIMM compatibility, see the Macintosh Products Guide on Apple’s website at www. apple.com/guide.You can purchase Apple-approved memory online from the Apple Store at www.apple.com/store.

Installation Rules

You must install DIMMs in pairs, and the DIMMs in each pair must be identical (the same size, speed, etc.).The first pair is installed in slots 1 and 2. Install the next pair in slots 3 and 4. Subsequent pairs go in slots 5 and 6, and then slots 7 and 8.

For Best Performance

For the best performance, use identical DIMMs in all slots and fill up slots 1 through 4 before you install DIMMs in slots 5 through 8. If you don’t have eight identical DIMMs, install identical DIMMs in slots 1 through 4 and a second set of four identical DIMMs in slots 5 through 8. If you can, after you fill slots 1 through 4, add a full set of four DIMMs in slots 5 through 8 instead of just a pair in slots 5 and 6.

Working Safely Inside the Xserve

Always touch the Xserve enclosure to discharge static electricity before you touch any components inside the Xserve.To avoid generating static electricity, do not walk around the room until you have finished working inside the server and have replaced the cover.To minimize the possibility of damage due to static discharge, wear an antistatic wrist strap while you work inside the Xserve.

Warning: Always shut down the Xserve and disconnect the power cords before opening it to avoid damaging its internal components or the components you are installing. Don’t open the server while it is turned on. Even after you shut down the Xserve, its internal components can be very hot. Let it cool before you open it.

Xserve (Late 2006/Early 2008) FB-DIMM Memory Replacement Instructions  2

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