How to show on your macbook pro M1 Max 16 inch (2021) if its 200 or 400 memory band width?

Hi Alexuniverse,

By checking out the MacBook Pro (16-inch, 2021) - Technical Specifications page, you'll see that if you have the M1 Max model, your memory bandwidth is 400GB/s. The M1 Pro model would have 200GB/s.

Hope this helps.

Have a good day.

Hey Alexuniverse,

That's a great question.

If you'd like to check on more details of the memory for your MacBook Pro, please follow the steps in this article: Check if your Mac needs more RAM in Activity Monitor - Apple Support

Take care!

Alexuniverse,

No worries. The Tech Specs we provided earlier does mention "Memory Bandwidth". It's in the "Chip" section:

Apple M1 Pro chip

10-core CPU with 8 performance cores and 2 efficiency cores

16-core GPU

16-core Neural Engine

200GB/s memory bandwidth

Apple M1 Max chip

10-core CPU with 8 performance cores and 2 efficiency cores

32-core GPU

16-core Neural Engine

400GB/s memory bandwidth

MacBook Pro (16-inch, 2021) - Technical Specifications

If you'd like to look at the 14" MacBook Pro Tech Specs:

MacBook Pro (14-inch, 2021) - Technical Specifications

Enjoy your day!

It's not just 'flipping a switch' that gets you 200 with the M1 Pro or 400 with the M1 Max. The hardware has physically different interfaces when accessing RAM memory.

this picture of the M1 Max die shows that there are FOUR memory access pathways, each 128 bits wide.

https://www.anandtech.com/show/17024/apple-m1-max-performance-review

The reviewer stated that the two adjacent 128-bit wide pathways on each die were use together to create a 256-bit wide pathway to the RAM on that side of the chip-carrier. Doubling the width doubles the speed.

This picture of the M1 Pro shows that fewer pathways to RAM memory are implemented on the die. This means the pathway to RAM is "only" 128 bits wide on the M1 Pro.:

source: ibid

That review also features this chart comparing original M1, M1 pro, and M1 Max graphics performance. we know now that M1 Ultra (available in the Mac Studio) will be twice the M1 max:

source: ibid