IBM QS21 Service Guide - Page 55
Replacing, fillers
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1 Slot at JDIM11 Slot at JDIM10 Slot at JDIM01 Slot at JDIM00 Figure 13. DIMM slot location There are four DIMM slots, two for each Cell/B.E. companion chip. If this is the first pair of DIMMs you are installing, use slots 00 and 11. Slots 00 and 11 are the two outer slots as shown in Figure 13. For a second pair of DIMMs, use the remaining slots 01 and 10. 5. Remove the DIMM fillers from the slots where you want to insert the DIMMs. Retain the DIMM fillers. You need them if you remove any DIMMs from the blade server as they are an important part of the blade server cooling system. 6. Place the DIMM in the slot, contact side down. Check the orientation of the module. The central locating pin in the slot should match the corresponding cut-out on the module. 7. Carefully press the module into place until the retaining clips snap into position. Make sure that the clips are locked properly. DIMM Retaining clip Figure 14. DIMM retaining clips 8. Repeat steps 6 and 7 until you have installed all the optional DIMMs. 9. Ensure that all unused DIMM slots are fitted with DIMM fillers. 10. If you do not want to install any other options, replace the cover and insert the BladeCenter QS21 into the BladeCenter unit. Replacing DIMM fillers For the BladeCenter QS21 cooling system to work properly there must be no empty DIMM slots. Unused slots must be fitted with DIMM fillers. Replace faulty DIMM fillers and, if you remove memory modules, fit empty slots with DIMM fillers. To install or replace DIMM fillers, complete the following steps: 1. Shut down the BladeCenter QS21. Chapter 4. Installing and removing replaceable units 37