IBM 86607SU Hardware Maintenance Manual - Page 222

Memory-module kits Note If installing a 256MB Registered memory module in the server, ensure the jumper is installed on pins 2 and 3 of Jumper Block J12 on the processor board. Adding memory to the server is an easy way to make programs run faster. You can increase the amount of memory in the server by installing options called memory-module kits. Each kit contains one industry-standard, dual-inline memory module (DIMM). The server uses a noninterleaved memory configuration. The server comes with a memory-module installed in connector J1, the connector nearest the rear of the server. Install additional memory modules in connectors J2, J3, and J4, in that order. If you mix DIMM sizes, install the largest sized DIMM in connector J1, the next largest sized DIMM in connector J2, and so forth. Notes 1. The memory-module kit sizes available for the server are 64 MB, 128 MB, and 256 MB. The server supports a minimum of 128 MB and a maximum of 1 GB of system memory. 2. Install only 3.3 V, 168-pin, 8-byte DIMMs. Only 100 MHz, 72-bit, unbuffered, synchronous, error correcting code (ECC), x8 configuration DIMM memory is supported for the 64 MB and 128 MB DIMMs. Only 100 MHz, 72-bit, registered, synchronous, ECC, x4 configuration DIMM memory is supported for the 256 MB DIMMs. 3. Mixing of DIMM types (registered and unbuffered) is not supported. You can install 64 MB unbuffered and 128 MB unbuffered DIMMs in the same system, but neither 64 MB unbuffered nor 128 MB unbuffered DIMMs can be installed in a system with 256 MB registered DIMMs. 4. Installing or removing memory modules changes the configuration information in the server. Therefore, after installing or removing a DIMM, save the new configuration information in the Configuration/Setup program. When you restart the server, the system displays a message indicating that the memory configuration has changed. Start the Configuration/Setup program and select Save Settings. See "Using the Configuration/Setup Utility Main menu" on page 91 for more information. 214 Netfinity Server HMM