In at least one embodiment, a server tray 202 is an immersive-cooled server tray that may be flooded by fluid. In at least one embodiment, a fluid for an immersive-cooled server tray may be a dielectric engineered fluid capable of being used in an immersive-cooled server. In at least one embodiment, a secondary coolant or two-phase fluid may be used to cool engineered fluid. In at least one embodiment, a two-phase fluid may be used to cool engineered fluid when a primary cooling loop associated with a secondary cooling loop circulating a secondary coolant has failed or is failing. In at least one embodiment, at least one cold plate therefore has ports for a secondary cooling loop and for a two-phase fluid cooling loop and can support a two-phase fluid cooling loop that is activated in an event of a failure in a primary cooling loop. In at least one embodiment, an intelligent in-rack pump or compressor unit may be used without a secondary cooling loop.