CPU Temperature Cause: Increase in voltage or speed?

[Steaksauce]

What do you guys think about this?

If you overclock your cpu without increasing voltage, do you still see the temps go up?

Is the heat a product of the increase in voltage or speed or both?

 

[Rio Rebel]

Increasing speed generates more heat, even without increasing voltage. I have not increased voltage on any part of my system, but have significantly overclocked the chip. There is a very distinct increase in temps when I go from 1.86 (stock) to 3.0 (overclocked), even though the voltage stays the same.

 

[Yellowbeard]

Originally posted by: Rio Rebel
Increasing speed generates more heat, even without increasing voltage. I have not increased voltage on any part of my system, but have significantly overclocked the chip. There is a very distinct increase in temps when I go from 1.86 (stock) to 3.0 (overclocked), even though the voltage stays the same.

This sounds interesting. How much did the temperature increase?

 

[Steaksauce]

I'd have to agree that speed is the cause of the heat since the same thing happens when i OC my e4300 from 1.8 to 2.8 without increasing the voltage in the BIOS.
BUT, since the effective voltage (not the BIOS voltage set in BIOS) increases slightly and fluctuates, we can't really keep that as a constant so there is some ambiguity there.

 

[Noubourne]

Kick up your voltage a tad with all other variables the same and you'll see a significant increase in temperatures.

More heat is produced from increasing voltage than from increasing clockspeed. Depending on the chip you can get a lot of extra clockspeed and only see moderate temperature increases. On C2D I bet you can do 1000Mhz and still stay under 10C difference.

On the other hand, a "mere" .2v could easily crank your temps up 10C, with zero clockspeed increase.

What will create more heat, a 40% overclock at stock voltage or a 40% overvolt at stock speeds? The overvolt will. In fact it would kill your chip, so clearly voltage causes more heat than simply increasing the speed of the chip.

 

[A554SS1N]

Originally posted by: Noubourne


More heat is produced from increasing voltage than from increasing clockspeed.

Agreed, the voltage is a much bigger factor - it's also a much bigger factor for power consumption too, which is no coincidence, as more waste heat is produced.