MSI B75MA User Guide - Page 19

MS-7808 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. Notch Volt 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. 19