MSI X99S GAMING 9 AC - Manual (Page 31)

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En-17
Mounting Screw Holes
When installing the motherboard, first install the necessary mounting stands required
for an motherboard on the mounting plate in your computer case. If there is an
I/O back plate that came with the computer case, please replace it with the I/O
backplate that came with the motherboard package. The I/O backplate should snap
easily into the computer case without the need for any screws. Align the mounting
plate’s mounting stands with the screw holes on the motherboard and secure the
motherboard with the screws provided with your computer case. The locations of the
screw holes on the motherboard are shown below. For more information, please refer
to the manual that came with the computer case.
Important
• Install the motherboard on a flat surface free from unnecessary debris.
• To prevent damage to the motherboard, any contact between the motherboard
circuitry and the computer case, except for the mounting stands, is prohibited.
• Please make sure there are no loose metal components on the motherboard or
within the computer case that may cause a short circuit of the motherboard.
The I/O ports should be facing toward the rear of the computer case. They should line up with the holes on the I/O backplate.