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10. If you have other options to install or remove, do so now; otherwise, go to
Installing memory modules
Adding memory to your server is an easy way to make programs run faster. You
can increase the amount of memory in your server by installing memory-module
options. When you install memory, you must install a pair of matched dual inline
memory modules (DIMMs). See the Option Installation Guide on the IBM xSeries
Documentation CD for more details.
Notes:
1. When you install additional DIMMs, be sure to install them in pairs. All the
2. The second pair does not have to contain DIMMs of the same size, speed, type,
3. Install only 133 MHz/266 MHz, 2.5 V, 184-pin, double-data-rate (DDR), PC2100,
4. Your server supports Chipkill
5. You do not need to save new configuration information when installing or
Install the DIMMs in the order shown in the following table.
9. Connect any needed cables to the adapter.
"Completing the installation" on page 35.
DIMMs in a single pair must be the same size, speed, type, and technology.
You can mix compatible DIMMs from various manufacturers.
and technology as the first pair.
registered synchronous dynamic random-access memory (SDRAM) with error
correcting code (ECC) DIMMs. These DIMMs must be compatible with the latest
PC2100 SDRAM Registered DIMM specification. For a list of supported options
for your server, go to http://www.ibm.com/us/compat/ on the World Wide Web.
than 128 MB. Using any 128 MB DIMMs, or DIMMs that are not of type x4, on
your server disables Chipkill memory.
removing DIMMs. The only exception is if you replace a faulty DIMM that was
marked as Disabled in the Memory Settings menu. In this case, you need to
re-enable that memory row in the Configuration/Setup Utility or reload the
default memory settings. See the User's Guide on the IBM xSeries
Documentation CD for more information.
Table 3. DIMM installation sequence
Pair
First
Second
Third
™
memory if the DIMMs are all type x4 and larger
DIMM connectors
6 and 5 (J15, J14)
4 and 3 (J12, J11)
2 and 1 (J9, J7)
Chapter 2. Installing options
27
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