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> And while I doubt x86 architecture will ever beat ARM on power efficiency, absolute power (within roughly comparable battery life) is another matter altogethe

by mcintyre1994 5y ago

> And while I doubt x86 architecture will ever beat ARM on power efficiency, absolute power (within roughly comparable battery life) is another matter altogether. This is a bit confusing, are they suggesting that laptops with this Alder Lake Mobility CPU will have "rougly comparable battery life" to M1 Max Macbook Pros, with better performance, despite having worse power efficiency?

WithinReason 5y ago
That's possible by having a bigger battery
- mcintyre1994 5y ago
  That's true, but do they have much headroom to do that without increasing the watt-hours? I know max size Macbook Pros have been at the TSA flight limit on that metric for ages and that's one reason it never increases.
camillomiller 5y ago
No, they’re just burying the most important metric, which is performance-per-watt
ArgyleSound 5y ago
There's a 100Wh restriction on laptop batteries imposed by civil aviation, which the 16" MacBook Pro hits, so this is not a problem that can simply be solved with thicker chassis and larger batteries either.
- rascul 5y ago
  > There's a 100Wh restriction on laptop batteries imposed by civil aviation This made me curious so I looked it up and found this bit on FAA's web site: > Size limits: Lithium metal (non-rechargeable) batteries are limited to 2 grams of lithium per battery. Lithium ion (rechargeable) batteries are limited to a rating of 100 watt hours (Wh) per battery. These limits allow for nearly all types of lithium batteries used by the average person in their electronic devices. With airline approval, passengers may also carry up to two spare larger lithium ion batteries (101–160 Wh) or Lithium metal batteries (2-8 grams). This size covers the larger after-market extended-life laptop computer batteries and some larger batteries used in professional audio/visual equipment. https://www.faa.gov/hazmat/packsafe/more_info/?hazmat=7 https://www.faa.gov/hazmat/packsafe/more_info/?hazmat=7

WithinReason 5y ago

That's possible by having a bigger battery

mcintyre1994 5y ago
That's true, but do they have much headroom to do that without increasing the watt-hours? I know max size Macbook Pros have been at the TSA flight limit on that metric for ages and that's one reason it never increases.

camillomiller 5y ago

No, they’re just burying the most important metric, which is performance-per-watt

ArgyleSound 5y ago

There's a 100Wh restriction on laptop batteries imposed by civil aviation, which the 16" MacBook Pro hits, so this is not a problem that can simply be solved with thicker chassis and larger batteries either.

rascul 5y ago
> There's a 100Wh restriction on laptop batteries imposed by civil aviation This made me curious so I looked it up and found this bit on FAA's web site: > Size limits: Lithium metal (non-rechargeable) batteries are limited to 2 grams of lithium per battery. Lithium ion (rechargeable) batteries are limited to a rating of 100 watt hours (Wh) per battery. These limits allow for nearly all types of lithium batteries used by the average person in their electronic devices. With airline approval, passengers may also carry up to two spare larger lithium ion batteries (101–160 Wh) or Lithium metal batteries (2-8 grams). This size covers the larger after-market extended-life laptop computer batteries and some larger batteries used in professional audio/visual equipment. https://www.faa.gov/hazmat/packsafe/more_info/?hazmat=7 https://www.faa.gov/hazmat/packsafe/more_info/?hazmat=7