A system comprising: a chassis configured for a server, wherein the chassis is a rectangular prism shape being defined by a first and second side wall, an upper wall, and a lower wall, wherein the system further comprises: arranged within the chassis, a first subboard and a second subboard, each arranged perpendicularly to the first side wall, second side wall, upper wall and lower wall, and defining between the first and second subboard a rectangular prism shaped space; the system further comprising a first air baffle intersecting with the first side wall and forming a first angle with the first subboard and a second angle with the second subboard, such that a first air cavity is formed, being a first triangular prism shaped space, that is defined by a first rectangular part of the first side wall, the air baffle, a first triangular part of the upper wall, a first triangular part of the lower wall, and a first rectangular part of the second subboard; a second space is defined as the space enclosed by the first subboard, the second subboard, the first and second side wall, the upper wall and the lower wall, without the space occupied by the first air cavity; wherein, in the first rectangular part of the first side wall defining the first air cavity, there is at least one first air intake vent and wherein in the first rectangular part of the second subboard defining the first air cavity, there is at least one first exhaust vent; wherein there is at least one first module connected to the first subboard by using an interface that is on the first subboard on the side thereof opposite to the space enclosed by the first and second subboards and the first subboard contains at least one second air intake vent proximate to said interface, and on the second subboard, opposed to the second air intake vent there is at least one second air exhaust vent, arranged to make air flow out of the second air intake vent, the air flowing via the one or more second air intake vents through the second air cavity included in the space between the first and second subboards that is not containing the first air cavity, and this air flow exiting via the one or more second air exhaust vents, and on the first rectangular part of the second subboard defining the first air cavity, there is connected at least one second module proximate to the one or more first air exhaust vents, such that the at least one first module and the at least one second module are arranged to be provided with independent heat dissipation by substantially separate air flows. arranged within the chassis, a first subboard and a second subboard, each arranged perpendicularly to the first side wall, second side wall, upper wall and lower wall, and defining between the first and second subboard a rectangular prism shaped space; the system further comprising a first air baffle intersecting with the first side wall and forming a first angle with the first subboard and a second angle with the second subboard, such that a first air cavity is formed, being a first triangular prism shaped space, that is defined by a first rectangular part of the first side wall, the air baffle, a first triangular part of the upper wall, a first triangular part of the lower wall, and a first rectangular part of the second subboard; a second space is defined as the space enclosed by the first subboard, the second subboard, the first and second side wall, the upper wall and the lower wall, without the space occupied by the first air cavity; wherein, in the first rectangular part of the first side wall defining the first air cavity, there is at least one first air intake vent and wherein in the first rectangular part of the second subboard defining the first air cavity, there is at least one first exhaust vent; wherein there is at least one first module connected to the first subboard by using an interface that is on the first subboard on the side thereof opposite to the space enclosed by the first and second subboards and the first subboard contains at least one second air intake vent proximate to said interface, and on the second subboard, opposed to the second air intake vent there is at least one second air exhaust vent, arranged to make air flow out of the second air intake vent, the air flowing via the one or more second air intake vents through the second air cavity included in the space between the first and second subboards that is not containing the first air cavity, and this air flow exiting via the one or more second air exhaust vents, and on the first rectangular part of the second subboard defining the first air cavity, there is connected at least one second module proximate to the one or more first air exhaust vents, such that the at least one first module and the at least one second module are arranged to be provided with independent heat dissipation by substantially separate air flows.