cube power supply and upgrades

[Richard Clark]

Everyone is always talking (and doing for that matter) upgrades on the 
cube bigger hard drives faster video cards and cpu upgrades. To cool as 
this stuff down fans are added one in the base of the cube and one 
usually on the video card. What about the cubes power supply if all 
these things are more powerful they drink more juice and that must heat 
up the brick also which would shorten it's life, is the power brick 
forgotten or is it already over engineered to take this extra 
punishment, should we think about cooling that also? Anybody have any 
ideas on this subject?