Dell XPS M1730 (M1730, Late 2007) - Manual (Page 21)

Memory 21
NOTICE: If you need to install memory modules in two connectors, install a
memory module in the connector labeled “DIMM1” before you install a module in
the connector labeled “DIMM2.” Insert memory modules at a 45-degree angle to
avoid damaging the connector.
5 Ground yourself and install the new memory module:
NOTE: If the memory module is not installed properly, the computer may not
boot properly. No error message indicates this failure.
a Align the notch in the module edge connector with the tab in the
connector slot.
b Slide the module firmly into the slot at a 45-degree angle, and rotate
the module down until it clicks into place. If you do not feel the click,
remove the module and reinstall it.
1 memory module 2 securing clip
1
2