Dell Vostro 400 (Mid 2007) - Manual (Page 113)

Removing and Installing Parts
113
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
DIMM connectors 1 and 3 or DIMM connectors 2 and 4.
NOTE:
Memory purchased from Dell is covered under your computer warranty.
Installing Memory
CAUTION:
Before you begin any of the procedures in this section, follow the
safety instructions in the Product Information Guide.
CAUTION:
Before installing memory, you must remove the PCI Express X16 card.
See "Cards" on page 116.
NOTICE:
To prevent static damage to components inside your computer, discharge
static electricity from your body before you touch any of your computer’s electronic
components. You can do so by touching an unpainted metal surface on the
computer chassis.
1 Pair A: matched pair of
memory modules in
connectors DIMM_1 and
DIMM_3 2 Pair B: matched pair of
memory modules in
connectors DIMM_2 and
DIMM_4
2
1