in direct contact with supply port 36 cover 40 is rotated to its upright position so it seals cooling chamber 33 valve 50 should be turned to the open position prior to starting up card 60 to remove or access card 60 valve 50 is preferably turned to the drain position so that no fluid flows out of spray module 80 a brief amount of time should pass before turning valve 50 to the closed position this time allows for any excess fluid to flow from cooling chamber 33 and into return chamber 31 any fasteners in cover 40 should be removed prior to rotating it downward and into the open position card 60 can then be removed from chamber 33 other embodiments of the present invention are possible one such embodiment is shown in fig1 a multi card cooling system 90 is shown having a plurality of multi card chamber 91 fundamentally multi card cooling system is the same as cooling system 20 of the preferred embodiment with the exception that the size of multi card chamber 91 allows for multiple cards to be placed inside of a single cooling chamber if two or more cards must be in operation together than it may be advantageous to access both cards at the same time the chassis may be less expensive to produce cards may be swapped quicker and there is less seal surface requirements than the preferred embodiment according to the present invention any number of cooling chambers greater than two may be employed and in any combination of single or multiple chambers.