Removing and Installing Parts 105
  NOTE: Always install memory modules in the order indicated on the system board.
The recommended memory configurations are:
– A pair of matched memory modules installed in connectors DIMM_1 
and DIMM_2
or
– A pair of matched memory modules installed in connectors DIMM_1 
and DIMM_2 and another matched pair installed in connectors 
DIMM_3 and DIMM_4
• If you install mixed pairs of DDR2 667-MHz (PC2-5300)and DDR2 800-MHz 
(PC2-6400) memory, the modules function at the slowest speed installed.
• Be sure to install a single memory module in the DIMM_1 connector, the 
connector closest to the processor, before you install modules in the other 
connectors.
  NOTICE: If you remove your original memory modules from the computer 
during a memory upgrade, keep them separate from any new modules that 
you may have, even if you purchased the new modules from Dell. If possible, 
do not pair an original memory module with a new memory module. 
Otherwise, your computer may not start properly. You should install your 
original memory modules in pairs either in connectors DIMM_1 and DIMM_2 
or connectors DIMM_3 and DIMM_4.
 
NOTE: Memory purchased from Dell is covered under your computer 
warranty.
book.book  Page 105  Tuesday, November 27, 2007  10:29 AM