Do I need standoffs?

Umaya40

Honorable
Nov 4, 2013
18
0
10,510
So i have the Obsidian 750D and an ASRock 990FX Extreme9 and the case has raised screw holes for the mobo and came with 1 instead of 4 standoff screws, because of the raised bumps for attaching the motherboard does this mean I don't need standoffs? I have spares from my screw bag so I can add them but do I need them?

MB: http://motherboard.findthebest.com/l/656/ASRock-990FX-Extreme9
CASE: http://www.corsair.com/en/pc-cases/obsidian-series-pc-case/obsidian-series-750d-full-tower-atx-case.html