Read Write speed of 1TB and 2TB SSD in MacBook Pro 16" 2021

[hajime]

Hi, for 16" M1 Pro and M1 Max at 16GB-32GB RAM, how is the read write speed of 1TB SSD compared with 2TB SSD? Any significant noticeable improvement in getting the 2TB SSD?

 

[bluegt]

Already a thread here:

MBP 2021 - SSD Speed Comparison - Please Contribute!

From some of the YouTube reviews, it looks like there are SSD chip configuration differences between the 14" and 16" models and significant speed differences across SSD sizes. Can I please get everyone's help to run Blackmagic speed tests - only takes 2 minutes. Please use 5GB stress file size...

forums.macrumors.com

 

[hajime]

Already a thread here:

MBP 2021 - SSD Speed Comparison - Please Contribute!

From some of the YouTube reviews, it looks like there are SSD chip configuration differences between the 14" and 16" models and significant speed differences across SSD sizes. Can I please get everyone's help to run Blackmagic speed tests - only takes 2 minutes. Please use 5GB stress file size...

forums.macrumors.com

It does not have the answers I asked. Check clearly.

 

[Significant1]

It does not have the answers I asked. Check clearly.

What are you missing?

 

[hajime]

What are you missing?

Read write speeds of:

M1 Pro 32GB 1TB and 2TB
M1 Pro 16GB 2TB

M1 Max 16 and 32GB with 1TB and 2TB.

That thread only has M1 Pro 16GB 1TB and M1 Max 64GB with 1, 2 and 4TB.

So, 7 out of 8 sets of data I asked are not there.

 

[Significant1]

Read write speeds of:

M1 Pro 32GB 1TB and 2TB
M1 Pro 16GB 2TB

M1 Max 16 and 32GB with 1TB and 2TB.

That thread only has M1 Pro 16GB 1TB and M1 Max 64GB with 1, 2 and 4TB.

So, 7 out of 8 sets of data I asked are not there.

Pro/max/ram is not the bottleneck and will not matter for the speed of the ssd. The bottleneck is the connection, and from the speed it sounds like they switched from pcie 3.0 in M1 to pcie 4.0 in M1 pro/max. And to answer your question, you will not notice the difference in daily use. Those speeds will only be reached by reading/writing big files, not many small files. Also 40gbps thunderbolt equals 5000MB/s, which will be even lower after overhead. So the fastest possible external connection will still be a bottleneck for the 1TB version. Conclusion, don't buy 2TB because of speed improvement, but because you need the space.

 

[hajime]

Pro/max/ram is not the bottleneck and will not matter for the speed of the ssd. The bottleneck is the connection, and from the speed it sounds like they switched from pcie 3.0 in M1 to pcie 4.0 in M1 pro/max. And to answer your question, you will not notice the difference in daily use. Those speeds will only be reached by reading/writing big files, not many small files. Also 40gbps thunderbolt equals 5000MB/s, which will be even lower after overhead. So the fastest possible external connection will still be a bottleneck for the 1TB version. Conclusion, don't buy 2TB because of speed improvement, but because you need the space.

Pro/max/ram is not the bottleneck and will not matter for the speed of the ssd. The bottleneck is the connection, and from the speed it sounds like they switched from pcie 3.0 in M1 to pcie 4.0 in M1 pro/max. And to answer your question, you will not notice the difference in daily use. Those speeds will only be reached by reading/writing big files, not many small files. Also 40gbps thunderbolt equals 5000MB/s, which will be even lower after overhead. So the fastest possible external connection will still be a bottleneck for the 1TB version. Conclusion, don't buy 2TB because of speed improvement, but because you need the space.

Thanks. If I get a 32GB system with 1TB and it runs out of memory and the system uses ssd as memory, will performance be better if I have a 2TB ssd?

 

[Significant1]

Thanks. If I get a 32GB system with 1TB and it runs out of memory and the system uses ssd as memory, will performance be better if I have a 2TB ssd?

No, not of practical value.

 

[Appid194]

thanks for the speed comparison!