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pshufd

macrumors G4
Oct 24, 2013
10,151
14,575
New Hampshire
I measured mine pull max 140w when pushing at its full limit with 100% gpu and cpu max. It’s difficult without stressing it with two apps.

I rarely go above 35% CPU use but normally go around 80% GPU. My CPU needs are at the level of base M1 but my GPU and RAM needs are higher than base M1. I only have the M1 Pro and I'd guess that the max is far less than 140 watts but it would never get there anyways with my workload.
 
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BigMcGuire

Cancelled
Jan 10, 2012
9,832
14,032
I rarely go above 35% CPU use but normally go around 80% GPU. My CPU needs are at the level of base M1 but my GPU and RAM needs are higher than base M1. I only have the M1 Pro and I'd guess that the max is far less than 140 watts but it would never get there anyways with my workload.
LOL with my M1 Max on a 16' MBP - I intentionally tried to stress the CPU (Parallels - Windows 11, VS 2022 - 3 browsers with several tabs - all the apps I could think of opened and running....) and according to Activity Monitor, something like 26%. lol. (All CPU).

The worst I do during gaming is slightly warming up the chassis. (World of Warcraft Classic (WOTLK) or Age of Empires II).

Most of the time when I'm checking the power usage - it's 10w idle and around 40-60w when gaming or doing something intensive. :p
 

Berries-A-Million

macrumors 6502
Feb 24, 2019
459
414
I rarely go above 35% CPU use but normally go around 80% GPU. My CPU needs are at the level of base M1 but my GPU and RAM needs are higher than base M1. I only have the M1 Pro and I'd guess that the max is far less than 140 watts but it would never get there anyways with my workload.

Yeah it took stress testing to get there. But under any normal use it wouldn’t ever see it.
 

David1986H

macrumors 6502
May 12, 2020
493
375
Cheshire, UK
Quick question...

Am I right in thinking that if I use apples usb c charge cable connected to the 140w brick for my 16" the charge will max out at 100W?

I was thinking on getting a slower charger but I don't think a 60-70W will be enough if I push the MacBook. Rather than buying the 96W charger I can just use the usb c cable plus it'll be cheaper.
 

Berries-A-Million

macrumors 6502
Feb 24, 2019
459
414
Quick question...

Am I right in thinking that if I use apples usb c charge cable connected to the 140w brick for my 16" the charge will max out at 100W?

I was thinking on getting a slower charger but I don't think a 60-70W will be enough if I push the MacBook. Rather than buying the 96W charger I can just use the usb c cable plus it'll be cheaper.

The cable and charger that comes with the laptop will top out at 140w. It’s specifically designed like that. Other manufactures have proprietary cables that do the same.
 

BigMcGuire

Cancelled
Jan 10, 2012
9,832
14,032
Most of the cheap USB C cables I've bought are limited to 60w. Anker has some 100w USB C cables but they're a little more pricey. And yeah, Berries-A-Million is right - Apple's cable can do 140w.
 

Chancha

macrumors 68020
Mar 19, 2014
2,327
2,150
Not the question I asked but ok I guess
the answer to your question is yes: the 100W limit is not in the cable or charger but in the rest of the type-C (Thunderbolt) ports on your 16", they are "only" USB PD version 3.0 as mandated by TB4 specs, with a maximum power profile of 20V5A (100W). Apple's white type-C charger cable then is also capped at 100W but you can use a 3rd party 240W cable and still only get 100W out of the type-C ports of the 16", even when plugged into a 140W charger.

The MagSafe port of the 16", then the MagSafe cable are otherwise both PD 3.1, with a max profile of 28V5A thus 140W total is possible. The charger side of course also have to support this but for now Apple's 140W power brick is no longer the only product that does this (it was when new).

Depending on what you want for the 3rd party charger, IMO for sake of cable confusion and cost, it currently is not worth it to deal with 140W at least on the road, because it takes a PD3.1 charger which is still rare and costly, and then you must use the MagSafe cable which is obviously not interchangeable with anything else.
 
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