Dell Vostro 220s Service Manual page 67

1 Pair A: matched pair of memory
modules in connectors DIMM_1 and
DIMM_2
1. Align the notch on the bottom of the module with the crossbar in the connector.
.
1 cutouts (2)
3 notch
NOTICE: To avoid damage to the memory module, press the module straight down into the connector while
you apply equal force to each end of the module.
2. Insert the module into the connector until the module snaps into position.
If you insert the module correctly, the securing clips snap into the cutouts at each end of the module.
3. Follow the procedure in
4. When the message appears stating that memory size has changed, press <F1> to continue.
2 Pair B: matched pair of memory
modules in connectors DIMM_3 and
DIMM_4
2 memory module
4 crossbar
After Working on Your Computer.