Adding Parts 95Adding MemoryYou can increase your computer memory by installing memory modules on the systemboard. For information on the type of memory supported by your computer, see "Memory"on page 103.NOTE: DDR 333 memory operates at 320-MHz when used with an 800-MHz front-side bus.DDR Memory OverviewDDR memory modules should be installed in pairs of matched memory size. This means thatif you purchased your computer with 128 MB of memory installed and you want to addanother 128 MB of memory, you should install it in the appropriate connector. If the DDRmemory modules are not installed in matched pairs, the computer will continue to operate,but with a slight reduction in performance.NOTE: Always install DDR memory modules in the order indicated on the system board.The recommended memory configurations are:• Install a pair of matched memory modules in connectors DIMM1 and DIMM2.or• Install a pair of matched memory modules in connectors DIMM1 and DIMM2 andanother matched pair in connectors DIMM3 and DIMM4.• Do not install ECC memory modules.• If you install mixed pairs PC2700 (DDR 333-MHz) and PC3200 (DDR 400-MHz)memory, the modules function at the slowest speed installed.• Be sure to install a single memory module in DIMM 1 or the connector closest to theprocessor before you install modules in the other connectors.J2936bk0.book Page 95 Tuesday, September 2, 2003 3:06 PM
