1. Installing Internal Optional DevicesExpress5800/B120f User's Guide 47Chapter 2 Preparations1.5.1 Adding Order and Precautions• Adding order depends on the number of CPUs installed.– 1-CPU configuration:Install DIMMs starting from the smallest DIMM slot number.– 2-CPU configuration:Alternately install DIMMs starting from the smallest DIMM slot number of each CPU.• Install DIMM one by one.• Install DIMMs starting from the largest capacity and from the smallest slot number.• RDIMM and LRDIMM cannot be installed together, if they are installed together, the CPU blade will fail tooperate correctly.• If the CPU blade does not have CPU#2 installed, DIMM slots CPU2_DIMM1 to CPU2_DIMM6 areunavailable.1.5.2 InstallationInstall the DIMM on the CPU blade according to the following procedure:1. Installation order in 1-CPU configuration differs from that in 2-CPU configuration.(1-CPU configuration)Remove the top cover and air duct according to Chapter 2 (1.3.1 Removal of top cover and 1.3.2Removal of air duct).If Mezzanine Card (Type 2) for blade is installed, remove it according to Chapter 2 (1.6.3 Removal).(2-CPU configuration)Remove the top cover, air duct, and hard disk drive cage according to Chapter 2 (1.3.1 Removal of topcover, 1.3.2 Removal of air duct, and 1.3.3 Removal of hard disk drive cage).If Mezzanine Card (Type 2) for blade is installed, remove it according to Chapter 2 (1.6.3 Removal).
