AMD Ontario APU pictured,die size ~77mm^2

[savantu]

You can't compare them since intel has more steps, N550 has a power consumption between 6.5W and 8.5W. T40N has a maximum power consumption between 5W and 9W. I think that's enough to say that you don't have enough to say anything about how one compares to the other. Or do you know something I don't?

What the is that ? From where do you pull this ranges ?
Do you understand what TDP is ?

If a chip has a TDP of 10w it means, that's the maximal power it will dissipate running power intensive commercial SW. The cooling solution needs to be able to remove 10w 24/7. The CPU itself can exceed its TDP in certain cases ( thermal virus for example ). Another metric is idle power, when the whole chip or parts of it are in deep power states.

So if T40N has a higher TDP than N550 it means at similar load levels it will burn more power. It should be fairly obvious.