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Comment by yoz-y | Hacker News Reader

> Never mind the whole issue with heat and battery life where AMD is miles behind.

That's just false. AMDs newer U models have TDP and performance per watt at the same level as the M1.

Apple has other advantages with the M1 (like running iOS programs, more optimised for their software and so on), so they still benefit from having their own chips. M1 is great, but it's not magic.

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The AMD CPU wattage != Apple’s SOC including graphics card, large parts of the motherboard and memory. If you’re right where can I buy an AMD laptop with 20h battery life?

My M1 MBA lasts around 6 hours if I do a lot of Google Meet calls.

Yes I've noticed something about Javascript and video seems to consume huge amounts of battery life. What do we think the battery life of an AMD 5800U laptop would be at Google Meet if you could buy one of course...

Doubt you can have battery life and javascript in the same phrase. They'll find a way to nullify any technological advance.

You are mixing battery life (= battery capacity / power consumption at low digits cpu usage) and performance per watt (= max performance / power consumption). M1 is better at the former, high end laptop Ryzen models are better at the latter.

No, I’m not mixing anything up; I mentioned heat and battery life. Where do I mention performance per watt?

AMD Ryzen 7 5800U - 15/25 watts TDP

Apple M1 - 10 watts TDP

If the numbers are accurate, then it is close. However, each company measures TDP in different ways. Plus AMD can boost to 30W for short periods of time. Obviously the boost is good when you need it. The big question, how does this affect battery consumption?

That said, AMD's biggest issue is supply. I don't know if it is supply issues from TSMC, or component issues with the OEMs. But it is nearly impossible to buy a 5800u.

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