A circuit card assembly for removable attachment to a computer system having a plurality of bracket slots arranged with a fixed pitch, the circuit card assembly comprising: a circuit card having a front end, a back end, and substantially parallel longitudinal edges (102C, 102D) between the front end and the back end, the circuit card including at least one bus connector extending from one of the longitudinal edges (102C, 102D); a bracket structure providing a mounting surface at the front end of the circuit card extending perpendicularly to a first surface of the circuit card and extending perpendicularly to the longitudinal edges (102C, 102D), the mounting surface comprising a bracket for engaging with a plurality of adjacent ones of the plurality of bracket slots; a plurality of heat generating components disposed on the first surface of the circuit card; a connector assembly disposed on the first surface of the circuit card at the front end, the connector assembly comprising a first input/output (I/O) connector and a second I/O connector in a stacked arrangement with respect to the first surface of the circuit card, wherein a width of the connector assembly is less than a width of the circuit card between the longitudinal edges (102C, 102D), wherein the first I/O connector is positioned between the second I/O connector and the circuit card, and wherein the first I/O connector and the second I/O connector extend through the bracket and are separated by the fixed pitch, the circuity card assembly further comprising: a U-shaped cover disposed over the first surface of the circuit card, the U-shaped cover having a first open end coincident with the front end of the circuit card, a second open end coincident with the back end of the circuit card, and a wall extending from an inner surface of the U-shaped cover towards the first surface of the circuit card, the wall defining at least a first zone and a second zone, wherein the first zone defines a path from the first open end to the second open end including the connector assembly and excluding the plurality of heat generating components, wherein the second zone defines a path from the first open end to the second open end excluding the connector assembly and including the plurality of heat generating components. a circuit card having a front end, a back end, and substantially parallel longitudinal edges (102C, 102D) between the front end and the back end, the circuit card including at least one bus connector extending from one of the longitudinal edges (102C, 102D); a bracket structure providing a mounting surface at the front end of the circuit card extending perpendicularly to a first surface of the circuit card and extending perpendicularly to the longitudinal edges (102C, 102D), the mounting surface comprising a bracket for engaging with a plurality of adjacent ones of the plurality of bracket slots; a plurality of heat generating components disposed on the first surface of the circuit card; a connector assembly disposed on the first surface of the circuit card at the front end, the connector assembly comprising a first input/output (I/O) connector and a second I/O connector in a stacked arrangement with respect to the first surface of the circuit card, wherein a width of the connector assembly is less than a width of the circuit card between the longitudinal edges (102C, 102D), wherein the first I/O connector is positioned between the second I/O connector and the circuit card, and wherein the first I/O connector and the second I/O connector extend through the bracket and are separated by the fixed pitch, the circuity card assembly further comprising: a U-shaped cover disposed over the first surface of the circuit card, the U-shaped cover having a first open end coincident with the front end of the circuit card, a second open end coincident with the back end of the circuit card, and a wall extending from an inner surface of the U-shaped cover towards the first surface of the circuit card, the wall defining at least a first zone and a second zone, wherein the first zone defines a path from the first open end to the second open end including the connector assembly and excluding the plurality of heat generating components, wherein the second zone defines a path from the first open end to the second open end excluding the connector assembly and including the plurality of heat generating components. a U-shaped cover disposed over the first surface of the circuit card, the U-shaped cover having a first open end coincident with the front end of the circuit card, a second open end coincident with the back end of the circuit card, and a wall extending from an inner surface of the U-shaped cover towards the first surface of the circuit card, the wall defining at least a first zone and a second zone, wherein the first zone defines a path from the first open end to the second open end including the connector assembly and excluding the plurality of heat generating components, wherein the second zone defines a path from the first open end to the second open end excluding the connector assembly and including the plurality of heat generating components.