Instal ling Upgr ades 65System MemoryYour computer supports Rambus dynamic random-access memory(RDRAM) Rambus in-line memory modules (RIMMs) in 64-, 128-, 256-,and 512-megabyte (MB) capacities (see "Sample Memory ModuleConfigurations"). Each socket that does not contain a RIMM must containa Rambus continuity RIMM (CRIMM). To locate the RIMM sockets on thesystem board, see "System Board Components."System Memory Installation GuidelinesWhen installing memory modules in the system board sockets, observe thefollowing guidelines:• To reach the maximum 2-gigabyte (GB) memory total, you mustinstall four 512-MB RIMMs that each have a maximum of 16 memorydevices. The system supports no more than a total of 64 memorydevices on all installed RIMMs.• See "RIMM Label" for the location of the label on a RIMM thatidentifies the number of memory devices it contains. You can alsodetermine the number of memory devices installed through theSystem Memory option in system setup.NOTE: The computer does not support RIMMs with six memory devices.• Each RIMM socket must be occupied either by a RIMM or a CRIMM,and must be upgraded in matched pairs of identical capacity in slots 1and 2 or slots 3 and 4.• Mixed RIMM pairs provides a capacity equal to the sum of the fourRIMMs; mixed pairs of RIMMs that provide error checking andcorrection (ECC) and non-ECC will all function as non-ECC.• Be sure to install a RIMM in socket 1 first (closest to the processor)before installing modules in the other sockets.• The system board supports PC600 and PC800 memory modules.PC700 memory is supported, but it will operate at PC600 speeds.
