IBM QS21 User Guide - Page 42
Adding, memory, modules
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Adding I/O DDR2 memory modules This section describes how to add extra I/O DDR2 memory. There are two slots per Cell/B.E. companion chip allowing up to 1 GB of memory for each Cell/B.E. companion chip for I/O buffering. DIMM filler DIMM slot at JDIM11 DIMM slot at JDIM10 DIMM filler DIMM slot at JDIM01 DIMM slot at JDIM00 Figure 15. DIMM slot location You must add memory as pairs of dual inline memory modules (DIMMs). You may fit one or more memory modules for each buffer, but each I/O buffer must use the same type of memory module and have the same amount of memory. The minimum amount of memory you can add is 512 MB per buffer, or one module per buffer. If you fit a single pair of DIMMs you must use slots JDIM00 and JDIM11. The BladeCenter QS21 supports VLP DDR2 512 MB DIMMs only. Note: The DIMMs are used as memory for the I/O buffers only. You cannot increase the size of system memory which is fixed at 1GB for each Cell/B.E. processor. To install extra I/O buffer memory, complete the following steps: 1. Shut down the BladeCenter QS21. 2. Remove the BladeCenter QS21 from the BladeCenter unit. 3. Open the top cover. 4. Locate the DIMM slots in which you want to insert the I/O DDR2 memory. modules. 26 QS21 Installation and User's Guide
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