10 IBM xSeries 350: Installation Guide• All the DIMMs installed in a bank must be the same size, speed, type, andtechnology. You can mix compatible DIMMs from various manufacturers.• All the banks do not have to contain DIMMs of the same size, speed, type, andtechnology. You can mix compatible DIMMs from various manufacturers.• The memory board contains 16 DIMM connectors and supports 4-way memoryinterleaving.To use the 4-way memory interleaving technology in your server, you must installDIMMs in all four connectors in each populated bank.• Install only 3.3 V, 168-pin, 8-byte, 100 MHz, PCI, PC100-322-622R, registeredsynchronous dynamic random-access memory (SDRAM) DIMMs with errorcorrecting code (ECC). Only 100 MHz, 72-bit, registered, synchronous DIMMmemory is supported for the 128 MB, 256 MB, 512 MB, and 1 GB DIMMs.• Installing or removing DIMMs changes the configuration information in theserver. Therefore, after installing or removing a DIMM, you must save the newconfiguration information using the Configuration/Setup Utility program. Seethe User’s Reference on the xSeries Documentation CD for more information.To install a memory module:1. Review the information in “Safety” on page v.2. Turn off the server and remove the power cords.3. Remove the top cover.4. Remove the memory-board assembly from the server.5. Select the connectors in which you want to install the DIMMs.6. Install the DIMMs in the connectors.7. Replace the memory-board assembly in the server.8. Install the top cover.9. Connect all cables and power cords.Memory slot 1Memory slot 5Memory slot 9Memory slot 13Error LEDsError LEDs