Compaq AP550 Compaq Professional Workstation AP550 Maintenance & Service G - Page 68

Removal and Replacement Procedures 3-35 DIMM Pair Installation Pair 1 Pair 2 Table 3-8 DIMM Configurations on SDRAM Expansion Board SDRAM Expansion Board 1 (RIMM Socket XMM1) SDRAM Expansion Board 2 (RIMM Socket XMM3) Upper DIMM Slot DIMM Lower DIMM Slot DIMM DIMM Upper DIMM Slot DIMM Lower DIMM Slot DIMM DIMM Removing and Installing DIMMs Important Guidelines for DIMM Installation When installing DIMMs, you MUST follow these guidelines: Table 3-9 DIMM Guidelines Guideline Use only 64-, 128-, 256-, or 512-MB, Registered 100-MHz Error Checking and Correcting (ECC) DIMMs. SDRAM expansion boards must be installed in pairs, populating the RIMM sockets in the following order: XMM1 and XMM3. Each SDRAM expansion board supports up to two DIMMs. A SDRAM expansion board can only be installed one way. Comment DO NOT INSTALL DIMMs THAT DO NOT SUPPORT ERROR CHECKING AND CORRECTING (ECC). Only two SDRAM expansion boards are supported. Total system support is up to four DIMMs providing up to 2-GB total memory when four 512-MB DIMMs are installed. Be sure to match the two key slots on the SDRAM expansion board with the tab on the RIMM socket. Push the SDRAM expansion board down into the RIMM socket, ensuring that it is fully inserted and properly seated. continued