Apple Power Mac G5 (Late 2004) - Manual (Page 49)

Chapter 3 Working Inside Your Computer 49
3 Open the ejectors on the DIMM slots by pushing them out to the sides.
4 Placing one hand on the back of the computer for support, align the first DIMM in the
slot and push both ends of the DIMM down until the tabs are vertical and the ejectors
snap into place.
Important: Do not touch the DIMM connectors. Handle the DIMM only by the edges.
5 Align the second DIMM in the opposite slot and push until the ejectors snap into place.
DDR SDRAM DIMM
(Your DIMM’s shape and components may vary.)
The DDR SDRAM DIMM fits into the slot only
one way. Align the notch in the DIMM with
the small rib inside the slot. With the ejectors
open (as shown), push the DIMM until it snaps
into place. The ejectors close automatically.
Connectors Notch DDR SDRAM slot
Ejectors
(They should be pushed outward to
be in the open position, as shown.)
To make sure the DIMMs are properly seated
in their slots, place one hand behind the computer
and hold the computer so that it does not move.
With your other hand, press each DIMM
firmly into its slot.
Your computer will have either 4 or 8
DDR SDRAM slots, depending on model.
Rib (inside slot)