Memory Module (Dimm) Connectors - Sony PCV-LX810 - Vaio Slimtop Computer System Reference Manual

Memory Module (DIMM) Connectors

Both sides of each Dual Inline Memory Module (DIMM) look very similar. The
side with pin 1 has a small "1" to the left of pin 1. Be sure to orient a DIMM
correctly in the DIMM connector (a small triangle on the connector indicates pin
1).
1 1 1 1
Indicates pin 1
O 1 2
N
{
DIMM1
DIMM2
Memory module (DIMM)
System Board
49