Power Dissipation Calculation

[TVS]

How to calculate power dissipation from overclocked CPU ? It's just only a knowledge, not any speacial purpose.

 

[Mikewarrior2]

via spec sheets, or with a little program called radiate available at overclockers.com for a quick approximation.



Mike

 

[uart]

To a rough approximation the power dissipation will increase in direct proportion to the frequency and in proportion to the square of the voltage.

 

[Muerto]

Power is equal to the core voltage times the current going through your CPU, P=IV. Check the technical documents for your CPU find out what the current is.


uart,

So you're saying that power = frequency x voltage sqaured, P=f*V^2? According to that my CPU is dissapating 2.45 Giga-Watts. :Q:Q I think I'm missing something.

 

[johncar]

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

 

[Duckie]

Try this: http://www.overclockers.com/tips40/OverCPU.xls

Nice proggy to calculate both wattage output and peltier sizing

Duckman