Whether or not a stand off is present, it's always best to support areas such as the power connector, memory slots, or pcie slots. I've use nonconductive rubber feet before. Sometimes have to a few together to get the height needed.
Living reality in a dream
p8z77v-deluxe, 3770K @ 4.6, +.050V offset, LLC at high, xspc raystorm/ex360 WC