Dell Dimension XPS T___ - Manual (Page 24)

To install a DIMM, perform the following steps:
1. Orient the DIMM so that the cutouts on its edge connector align with the crossbars in the central groove of the socket.
2. Insert the DIMM straight down into the socket, making sure that it fits into the vertical guides at each end of the socket.
3. Press firmly until the DIMM snaps into place.
NOTICE: Do not press near the middle of the DIMM. Doing so may break the module.
If you have inserted the DIMM correctly, the securing tabs at each end of the socket snap into the cutouts at each end of the DIMM.
SECC2 Package and Heat Sink Assembly
1 Cutout
2 Securing tabs (2)
3 Crossbars in central groove of socket (2)
NOTE: Your system only supports 100-megahertz (MHz) DIMMs. To support error checking and correction (ECC), all installed DIMMs
must be ECC-capable. Note that ECC DIMMs have an odd number of memory chips on the module and non-ECC DIMMs have an even
number of chips.
1 Shroud
2 SECC2 package
3 Heat sink
4 Guide bracket assembly
5 Guide-bracket assembly latch