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IBM 520 - Page 187

IBM 520
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Installing Memory-Module Kits
Installing Memory-Module Kits
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 options called memory-module kits. Your server uses
72-pin, single-inline, Error Correcting Code on SIMM (EOS) memory
modules. The EOS feature increases system reliability by detecting
single-bit memory errors and correcting them in real time, without
reducing system performance.
You install memory-module kits in connectors inside the server.
Memory-module kits must be installed in pairs of the same size and
speed. All models have eight memory connectors. You can install
up to 256 MB of EOS memory in your server. The memory-module
kit sizes available for your server are 16 MB and 32 MB. The correct
speed for these kits is 70 ns.
Notes:
1. It is possible to install SIMMs in combinations where the
total amount of installed memory does not appear on the
memory configuration screen. In the unlikely event that
this occurs, select the next lower setting on the memory
configuration menu, and all of the installed memory will
be supported on your server.
2. The PC Server 520 does not support memory expansion
adapters.
3. Parity memory-module kits must not be used in
combination with EOS memory-module kits.
Before you begin:
Be sure you have:
Read “Electrical Safety” on page 161 and “Handling
Static-Sensitive Devices” on page 162.
Removed the server side cover (see “Preparing to Install
Options” on page 163).
Chapter 5. Installing Options 169

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