MSI B75A-E33 Series Manual page 19

Installing Memory Modules
. unlock the dIMM slot by pushing the mounting clips to the side. Vertically
insert the memory module into the dIMM slot. the memory module has an
off-center notch on the bottom that will only allow it to fit one way into the
dIMM slot.
2. push the memory module deep into the dIMM slot. the plastic clips at each
side of the dIMM slot will automatically close when the memory module is
properly seat and an audible click should be heard.
3. Manually check if the memory module has been locked in place by the dIMM
slot's side clips.
IMportANt
to ensure system stability, memory modules must be of the same type and den-
sity in dual-Channel mode.
Notch
Volt
MS-7758
9