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66 Removing and Installing Parts
Memory
You can increase your computer memory by installing memory modules on the system board. Your
computer supports DDR2 memory. For additional information on the type of memory supported by your
computer, see "Memory" on page 107.
NOTICE: Do not install ECC or buffered memory modules. Only unbuffered, non-ECC memory is supported.
Memory Installation Guidelines
• DIMM connectors must be populated in numerical order beginning with connectors DIMM_1 and
DIMM_2, then connectors DIMM_3 and DIMM_4.
If a single DIMM is installed, you must install it in connector DIMM_1.
• For best performance, memory modules should be installed in
pairs of matched memory size, speed, and
technology
. If the memory modules are not installed in matched pairs, the computer will operate, but
with a slight reduction in performance. (See the label on the module to determine the module’s
capacity.) For example, if you install a mixed pair of DDR2 533-MHz and DDR2 667-MHz memory,
the modules function at the slowest speed installed.
13 video connector (VIDEO1) 14 battery socket (BT1) 15 Internal USB connector (USB1)
16 PCI Express x16 connector
(SLOT1)
17 standby power indicator
(AUX_PWR_LED)
18 PCI Express x1 connector (SLOT2)
19 PCI connector (SLOT3) 20 PCI connector (SLOT4) 21 password jumper (PSWD)
22 floppy drive connector
(FLOPPY1)
book.book Page 66 Monday, July 23, 2007 3:47 PM