Hi, which case are you using? Just take the standoffs that came with your case (the ones that are hexagonal and made of something like brass) and install it into the motherboard tray (refer to the Case manual in case you don't know which ones to put it on). Then put the motherboard on the standoffs and use the screws (also refer to the case manual) and screw it in. Don't screw it too tight put not hanging.