MSI B75IA-E33 Series Instruction Manual page 19

Installing Memory Modules
. unlock the dIMM slot by pushing the mounting clip 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 clip at one 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 clip.
IMportANt
* to ensure system stability, memory modules must be of the same type and
density in dual-Channel mode.
* due to the hardware limitation, you should follow the installing procedures: first
memory modules, then graphics card. While uninstalling, remove graphics card
first if necessary.
Notch
Volt
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