Gateway E-4650 - Manual (Page 45)

Installing memory 37
Installing memory
When you upgrade your computer memory, make sure that you install the
correct type of memory module for your computer. For more information
about your computer’s memory type, see “Specifications” on page 104.
Installing or replacing RIMM memory
You need to use a combination of Rambus Interface Memory Modules
(RIMMs) and Continuity-RIMMs (C-RIMMs). All memory slots must be filled
with either a RIMM or a C-RIMM.
RIMMs
RIMM memory has a metal cover on one or both sides of the module.
C-RIMMs
C-RIMMs are placeholders that let the memory modules work. A C-RIMM does
not have a metal cover on either side of the module.