Dell Inspiron 545s (Early 2009) - Manual (Page 31)

5. Insert the memory module into the connector until the memory module snaps into position.
If you insert the memory module correctly, the securing clips snap into the cutouts at each end of the memory module.
6. Replace the computer cover (see Replacing the Computer Cover ).
7. Connect your computer and devices to electrical outlets, and then turn them on.
If the message appears stating that memory size has changed, press <F1> to continue.
8. Log on to your computer.
9. Right-click the My Computer icon on your Microsoft ® Windows ® desktop and click Properties.
10. Click the General tab.
11. To verify that the memory is installed correctly, check the amount of memory (RAM) listed.
Recommended Memory Configuration
While installing or replacing memory, refer to the table below:
Setting Up Dual Channel Memory Configuration
Inspiron 545s
3 notch 4 memory module
CAUTION: To avoid damage to the memory module, press the memory module straight down into the connector while you apply equal force to
each end of the memory module.
1 cutouts (2) 2 securing clip (snapped in position)
Model One module Two modules Three modules Four modules
535s/537s DIMM1 DIMM1
DIMM2 NA NA
545s DIMM1 DIMM1
DIMM3 DIMM1
DIMM3
DIMM2 DIMM1
DIMM3
DIMM2
DIMM4
546s DIMM1 DIMM1
DIMM2 DIMM1
DIMM2
DIMM3 DIMM1
DIMM2
DIMM3
DIMM4
NOTE: Dual channel memory is not supported on Inspiron™ 535s/537s.