Muerto,
uart wrote...."To a rough approximation the power dissipation will increase in direct proportion to the frequency and in proportion to the square of the voltage". Key words are "pd will increase"...not "pd equals".
Uart expressed power dissipation as a RATIO between oc'd freq and spec freq and voltage voltage...which answers TVS's question re power dissipation of "overclocked" cpu.
PDoc = PDspec*(MHZoc/MHZspec)*(VCOREoc/VCOREspec)^2
If you know/estimate PDspec you can calc PDoc for oc'd conditions. That's how it's most frequently done.
John C. aka Le Vieux