IBM IntelliStation M Pro 6230, Руководство пользователя, Страница: 87 / 166

- A round SCSI cable connects external SCSI devices to the integrated SCSI
controller on the system board. For more information about connecting
SCSI devices, see the SCSI documentation.
Installing memory modules
The following notes describe the types of dual inline memory modules (DIMMs) that
your computer supports and other information that you must consider when
installing DIMMs:
Notes:
1. When you restart the computer after adding or removing a DIMM, the computer
displays a message that the memory configuration has changed.
2. Your IntelliStation M Pro Type 6230 computer uses industry-standard PC2700 or
PC3200 double-data-rate (DDR) dual inline memory modules (DIMMs).
3. The system board contains four DIMM connectors and supports two-way
memory interleaving.
4. The DIMM options available for your computer are 256 MB, 512 MB, and 1
GB. Your computer supports a minimum of 256 MB and a maximum of 4 GB of
system memory.
5. The amount of usable memory will be reduced depending on the system
configuration. A certain amount of memory must be reserved for system
resources. The BIOS code will display the total amount of installed memory and
the amount of configured memory.
6. Your computer comes with either one or two 256 MB, 512 MB, or 1 GB memory
DIMMs installed. If your computer has one DIMM installed, when you install an
additional DIMM, it must be installed in DIMM 3 memory connector and must be
the same size, speed, type, and technology as the DIMM installed in DIMM 1
memory connector. You can mix compatible DIMMs from various manufacturers.
When one DIMM is installed in the computer, the computer runs as a
single-channel computer. When you add a DIMM in DIMM 3 memory connector,
your computer defaults to a dual-channel computer.
7. DIMMs must be installed in matched pairs. The first pair of DIMMs you install in
DIMM 1 and DIMM 3 memory connectors must be the same size, speed, type,
and technology. You can mix compatible DIMMs from various manufactures. If
you install a second pair of DIMMs in DIMM 2 and DIMM 4 memory connectors,
they do not have to be the same size, speed, type, and technology as the
DIMMs installed in DIMM 1 and DIMM 3 memory connectors. However, the size,
speed, type, and technology of the DIMMs you install in DIMM 2 and DIMM 4
memory connectors must match each other.
8. Install only 2.5 V, 184-pin, double-data-rate (DDR), PC2700 or PC3200,
unbuffered synchronous dynamic random-access memory (SDRAM) with error
correcting code (ECC) DIMMs. These DIMMs must be compatible with the latest
PC2700 or PC3200 SDRAM unbuffered DIMM specification. For a list of
supported options for your computer, go to http://www.ibm.com/pc/; then, select
your country and navigate to the list of options for your computer.
Complete the following steps to install a DIMM:
1. Read the safety information beginning on page vii, and the guidelines in
“Handling static-sensitive devices” on page 29.
2. Turn off the computer and all attached devices (see “Turning off the computer”
on page 20).
3. Disconnect all external cables and power cords; then, remove the side cover
(see “Removing the side cover” on page 53.)
Chapter 4. Installing options
65