Total Chip Power Calculator
Work out total chip power instantly with clear inputs, formula shown and shareable results.
About Total Chip Power Calculator
Total power is dynamic plus leakage plus IO, all divided by voltage regulator efficiency because the platform must supply the regulator losses too. At 88% efficiency a 71 W chip draws 81 W from the board, and that extra 10 W still has to be cooled.
Formula
Total power
chip power = dynamic + leakage + IO; socket power = chip power / regulator efficiency
Worked example
With the default values below, Total Chip Power Calculator returns Total power at the socket of 80.68. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Dynamic power
- 48 W
- Leakage power
- 14 W
- IO and SerDes power
- 9 W
- Voltage regulator efficiency
- 88 %
Results
- Total power at the socket
- 80.68 W
- Chip power
- 71.00 W
- Regulator loss
- 9.68 W
- Leakage share of chip power
- 19.72% %
Step by step
- 1Values used
- 2Total power
- 3Total power at the socket= 80.68 W
- 4Chip power= 71.00 W
- 5Regulator loss= 9.68 W
- 6Leakage share of chip power= 19.72 %
Assumptions and limits
- The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
Why include regulator loss in the thermal design?
Because the loss is dissipated on the board next to the chip, often inside the same cooling zone, and it counts against the platform power budget.
Is IO power significant?
Increasingly so. High-speed SerDes can consume 5-15 pJ per bit, so a chip with terabit-class IO spends tens of watts just moving data.
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