A mounting bracket for securing a mezzanine card in a stacked single board computer includes a main body that includes a first end, an opposite second end, a first side surface, and an opposite second side surface. The main body is sized to be positioned along a side surface of the mezzanine card, wherein the first side surface or the second side surface contacts the side surface of the mezzanine card to facilitate securing the side surface of the mezzanine card with respect to a top PCB. The mounting bracket also includes a first arm formed at the first end of the main body, a second arm formed at the second end of the main body, and at least one top rail coupled to the main body, wherein the top rail is configured to secure a top surface of the mezzanine card with respect to a top PCB.