I wouldn't be too sure about that. It has 1GB soldered
in and one SODIMM slot. The 945GM datasheet seems to be indicating
that SODIMM could be a 2GB module. The total max might be 1+2=3GB.
(If the original memory wasn't soldered in, it could have been upgraded
as well.) For performance reasons, a better combo would be 1+1 (dual
channel
symmetric mode). It all depends on whether the OS caching habits
with 3GB total, exceed the benefits of running 1+1 dual channel symmetric
and getting slightly more memory bandwidth.
http://www.memoryx.net/dellbuo.html
http://www.notebookcheck.net/Review-Dell-Latitude-D430-Subnotebook.7900.0.html
"The reviewed notebook was equipped with one Gigabyte soldered DDR2
RAM.
Nevertheless, the RAM capacity can still be easily enhanced to up to 3
GB,
because there is a free memory slot hidden beneath a maintenance
opening.
Considering the current RAM costs, this is surely a good idea. But,
Windows XP ran also smoothly with only one GB RAM."
See Table 22 and Figure 15, starting on PDF page 339. This is the
info for the 945GM, which should be the chipset of that computer.
http://www.intel.com/Assets/PDF/datasheet/309219.pdf
You can verify the chipset present, with something like CPUZ. Some
chipsets are hard to tell apart, so the utilities identify the
chipset as a member of a "family", rather than stating it is one
exact chipset. Using the no-install version of this utility,
means you can just run the executable without needing to
mess around.