Sony PCV-RX480DS - Manual (Page 70)

VAIO Digital Studio™ System Reference Manual
56
Memory Module (RIMM) Slots
Be sure to orient a RIMM module such that pin 1 of the RIMM module is
on the same side as pin 1 of the slot. The RIMM module shows "A1" on
the pin 1 end, and the system board shows “Pin 1” next to the pin 1 end of
the slot.
RIMMA1 RIMMA2 RIMMB1 RIMMB2
A1
A4
6 A4
7
A9
2
WARNING HOT
A1
A4
6 A4
7
A9
2
Memory module (RIMM A1/B1)
Blank memory module (CRIMM A2/B2) Pin 1 side