Handset cohabitation: Ubuntu for Android
Posted Mar 1, 2012 20:54 UTC (Thu) by khim
In reply to: Handset cohabitation: Ubuntu for Android
Parent article: Handset cohabitation: Ubuntu for Android
If a 1.6 ghz atom gets red hot and a 1ghz arm is tiny and gets a little warm, do you really believe they are anywhere equivalent.
Sorry, but Z2460 has TDP of 4W and it's full SoC: CPU, video, etc. Everything. I doubt you can get it “red hot” without putting it in vacuum flask.
ARM chips are impressive at what they do especially per joule of heat.
Sure, ARM chips are impressive but so are Intel's. And Intel has advantage in the semiconductor process technology - enough to compensate for CISC/RISC difference. They just started from the opposite points: Intel had chips which were much faster (yes, even Atom), but also significantly more power-hungry. ARM increased speed over time - but this leads to increased power consumption, too: toys like ASUS Transformer Prime can become pretty hot under heavy load. Intel needed to decrease consumption instead: even three year old model is faster then CPU in aforementioned brand-sparkling-new ASUS Transformer Prime… but it needs few times more power, too.
That's why today they are roughly equivalent: they started from the opposite points on the speed/consumption spectrum, but in the last three years they moved toward the same point. I think when we'll see Cortex-A15 we'll find out it's roughly equivalent to what Intel will show then, too: Intel will need to further reduce consumption of it's “serious” chips (Core line, not Atom line) while ARM will need to increase speed yet again.
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