Volts and Watts

[fornowagain]

Exponential? No, power comes from the square of the voltage.

I've simplified this and ignored static power leakage. But its pretty close in practical terms. A common expression for semiconductor power P, P=kLV²F

Where:
L = Load (from software)
V = Core voltage, default vcore V1 is VID.
F = Chip frequency
k = Empirical constant for the chip.
Pd = Total cpu power
TDP = Thermal Design Power

Therefore delta P, i.e. change in power Pd-TDP. Rearrange for Pd, the constants cancel.

Pd = TDP x (F2/F1) x (V2/V1)²

Or a little easier to understand

OCed Watts = TDP x (OCed Mhz / Default Mhz) x (OCed Vcore / Default Vcore)²


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