Patent ID: 7079387

Claim:
A computer system comprising: an enclosure; a first printed circuit board; a first connector coupled to the first printed circuit board; a second connector coupled to the first printed circuit board; a forced air cooling system configured to direct air flow towards the first connector and the second connector; a first replaceable unit having a second printed circuit board releasably connected to the first printed circuit board by the first connector and a first component coupled to the second printed circuit board and located within a first space; a second replaceable unit having a third printed circuit board releasably connected to the first printed circuit board by the second connector and a second component different than the first component, coupled to the third printed circuit board and located within a second space; a first air flow blocking system including: a first member coupled to the enclosure; and a second member coupled to the first replaceable unit, wherein the first member and the second member interact to partially block air flow to the first space by a first degree; and a second air flow blocking system including a third member coupled to the enclosure and a fourth member coupled to the second replaceable unit, wherein the third member and the fourth member interact to partially block air flow to the second space by a second degree different than the first degree.