A retention mechanism is provided for removably securing a smaller sized server or other rack-mounting computing asset into a larger sized server tray and rack, which are larger in width than the computing asset. The tray includes an edge configured to align and couple with the end of one or more clips, which may be removably installed on the tray. The clips include a bowed portion that contacts the surface of the computing asset when installed so as to apply a securing force on the computing asset and into the tray. The resulting friction between the server and the clip and between the server and the tray secures the server in place in the tray.