The V6 has a fan that sucks air in from the base, across the Hard Disk in a lower compartment and then blows this (now warm air) across the processor and video processing chips to exit at the top of the box.
There are two moving devices in the box that create some noise. The Hard Disk and this Fan. For effective cooling the fan needs to be operation properly and the inlet and vents must be clear (from dust).
Do you hear any excessive noise (or no noise) from the box?