Dell OptiPlex 755 - Manual (Page 41)

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Dell™ optiplex™ 755 technical guiDe
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chassis EncLosurE anD vEntiLation rEquirEMEnts
EncLosurE vEntiLation
If your enclosure has doors, they need to be of a type that
allows at least 30% airflow through the enclosure (front and back).
EncLosurE MiniMuM cLEarancE
Leave a 10.2 cm (4 in.) minimum clearance on all vented sides of
the computer to permit the airflow required for proper ventilation.
rEcoMMEnDED EncLosurE
Do not install your computer in an enclosure that does not
allow airflow. This restricts the airflow and impacts your
computer’s performance, possibly causing it to overheat.
opEn DEsk MiniMuM cLEarancE
If your computer is installed in a corner, on a desk, or under
a desk, leave at least 5.1 cm (2 in.) clearance from the back
of the computer to the wall to permit the airflow required for
proper ventilation.