# "Overclocked" frequency and Power dissipation

Discussion in 'Electronic Basics' started by Jack, Apr 11, 2007.

1. ### JackGuest

What is the relationship between the "Overclocked" frequency on a CPU
and its power dissipation?
Thx

2. ### Stanislaw FlattoGuest

CPU's are digital circuits and the old technology was to built those
circuits in totem-pole configuration when one segment is on and the
other off. But on transition there is a short time when both segments
are conducting current and this is doing work (read, producing heat).
When you overclock, two possibilities, one the clock is too fast for the
matrix to respond and do something useful, two the whole package is
not build to release the additional heat produced, so bye,bye CPU!

HTH

Stanislaw

3. ### Anthony FremontGuest

Roughly linearly proportionate. For example, 10% increase in clock speed ~=
10% increase in power dissipation.

4. ### JackyGuest

Any mathematical equations???
Thanks
Jack

5. ### Greg NeillGuest

What are you looking for, a physical motivation
for the relationship or a practical rule of
thumb? In other words, what do you need the
equation for?

6. ### Stanislaw FlattoGuest

Very roughly;^), dependant on linearity of the package to dissipate the
additional linearly produced heat. (Thermodynamics, enthropy,
refrigeration and other technical vermin)
Note: "Don't overclock unless you know what you are doing!"

HTH

Stanislaw

yes.