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Can HWinfo monitor how much power(watt) a laptop use?

I wonder is there anyway that I can know how much power that my laptop use?
I have Alienware 17R2, and my psu adapter is 240W. Is there a way I can know at the moment, how much power does CPU, GPU consume? It would be including monitor, RAM, fans,...

I read somewhere and can find that my CPU is about 47W max, GPU can go up to 100W or something. But how can I know how much power it really use?
If the CPU/GPU feature dedicated power measurement, you should see that in HWiNFO sensors.
As for total power usage, this is only possible by monitoring how much power is being drawn from the Battery when disconnected from main power - should be also possible under the Smart Battery sensor.

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