Apple Power Macintosh 4400 - Manual (Page 175)

2 If you want to install a cache DIMM, proceed to “Installing a High Performance Module
(level 2 cache DIMM),” next. If you are finished installing items in your computer,
proceed to the section “Closing the Computer” later in this Appendix.
Video DIMM (Your DIMM’s shape and components may vary.)
Notch
The video DIMM is designed to fit into the slot only one
way. Be sure to align the notch in the DIMM with the small
rib inside the slot. Push down on the DIMM until it snaps
into place.
Connectors Video DIMM slot
Front of computer
Rib (inside slot)
175 Installing Expansion Cards and Additional Memory