Ao i have the asrock h110m dgs MOBO. I have the corsair 88r case. The mobo only has 4 standoff holes, the other holes are just tiny black ones. Also, one of the standoffs pre-installed in the case, isn't really a standoff. It's just this screw that you screw into the motherboard. So basically i have no idea weather 3 is enough or I somehow need more.