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A comment on Apple’s new M1 Pro and M1 Max processors. Parent comment

Re:Apple’s new M1 Pro and M1 Max processors by jerrysievert on Monday October 18, 2021 @05:40PM (#28912138)
the power supply is for charging the battery faster. the new magsafe 3 system can charge with more wattage than usb-c, as per the announcement. usb-c max wattage is 100 watts, which was the previous limiting factor for battery charge.
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Re:Apple’s new M1 Pro and M1 Max processors by gumby on Monday October 18, 2021 @05:56PM (#28912315)
USB Power Delivery 3.1 goes up to 240 W (or, I should say, “will go up” as I don’t think anybody is shipping it yet)
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Re:Apple’s new M1 Pro and M1 Max processors by robert_foss on Monday October 18, 2021 @05:54PM (#28912297)
USB-C 3.1 PD delivers up to 240watts.
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Re:Apple’s new M1 Pro and M1 Max processors by aetherspawn on Monday October 18, 2021 @09:40PM (#28913956)
That's with 2 connectors right? I have a Dell Precision 3760 and the one connector charging mode is limited to around 90W. With two connectors working in tandem (they snap together), it's 180W.

The connectors never get remotely warm .. in fact under max charge rate they're consistently cool to touch, so I've always thought that it could probably be increased a little bit with no negative consequences.

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Re:Apple’s new M1 Pro and M1 Max processors by wlesieutre on Monday October 18, 2021 @11:55PM (#28914693)
Single connector, the 3.1 spec goes up to 5A at 48V. You need new cables with support for the higher voltages, but your "multiple plugs for more power" laptop is exactly the sort of device it's designed for.

It was announced earlier this year, so not in wide use yet. PDF warning: https://usb.org/sites/default/files/2021-05/USB%20PG%20USB%2...

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Re:Apple’s new M1 Pro and M1 Max processors by jsjohnst on Tuesday October 19, 2021 @05:08AM (#28916222)
I’ve not seen any manufacturer even announce they were going to make a supported cable yet, let alone seen one that does. I might’ve missed it though. This will only make the hell of USB-C cabling worse imho.
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Re:Apple’s new M1 Pro and M1 Max processors by GeekyBear on Tuesday October 19, 2021 @08:33AM (#28917374)
The USB Implementers Forum announced a new set of cable markings for USB 4 certified cables that will combine information on the maximum supported data rate and maximum power delivery for a given cable.
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Re:Apple’s new M1 Pro and M1 Max processors by wlesieutre on Tuesday October 19, 2021 @10:29AM (#28918470)
Currently I think there aren't any, and the MBP will only get its full 140W capacity using the magsafe cable.
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Re:Apple’s new M1 Pro and M1 Max processors by SpelingBeeChamp on Monday October 18, 2021 @08:39PM (#28913640)
Color me skeptical.

I believe you (and Apple) that the battery can be charged faster, but I am currently rendering video on an M1 MBP. Its power draw: ~20 Watts.

That's a lot of charging overhead.

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Re:Apple’s new M1 Pro and M1 Max processors by nilsbunger on Monday October 18, 2021 @11:05PM (#28914428)
The 16” has a 100wh battery, so it needs 100w of power to charge 50% in 30 minutes (their “fast charging”). Add in 20w to keep the laptop running at the same time, and some conversion losses, and a 140w charger sounds just about right.
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Re:Apple’s new M1 Pro and M1 Max processors by SpelingBeeChamp on Wednesday October 20, 2021 @03:06AM (#28927663)
That actually sounds on the money. I hope you're right!
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Re:Apple’s new M1 Pro and M1 Max processors by cpuguy83 on Monday October 18, 2021 @09:31PM (#28913915)
The other end of the new MagSafe is usb-c, which gets plugged into the power adapter.
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Re:Apple’s new M1 Pro and M1 Max processors by simonh on Tuesday October 19, 2021 @04:04AM (#28915880)
Sure, but it's an Apple cable plugging into an Apple socket. They don't have to be constrained by the USB-C specs and could implement a custom high power charging mode. In fact I believe some other laptop manufacturers already do this.
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