Dell OptiPlex 330 (Late 2007) - Manual (Page 14)

14
Quick Reference Guide
• 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.
NOTICE:
Do not install your computer in an enclosure that does not allow airflow.
Restricting the airflow impacts your computer’s performance, possibly causing it to
overheat.