512GB vs 1TB speeds on 16-inch M3

[Abbas]

I am looking to get the 16-inch M3 MBP and the standard Pro with 18GB RAM will be more than sufficient. What I wanted to know was if the 512GB SSD will be noticeably slower than the 1TB version. Also, I think I read somewhere that M3 Max has more bandwidth than M3 Pro so the SSDs are faster on the Max- but I'm not sure. Anyone has any concrete info or benchmarks?

 

[jav6454]

Assuming same controller and NAND manufacturer:

Normally, an SSD with higher capacities have faster sustained sequential or random write speeds. Read speeds will be the same at either random or sequential.

 

[Bigwaff]

What I wanted to know was if the 512GB SSD will be noticeably slower than the 1TB version.

Only to benchmarking software or workflows with heavy sustained writes to disk, otherwise, in normal everyday use, you won't even notice a difference.

 

[Abbas]

Only to benchmarking software or workflows with heavy sustained writes to disk, otherwise, in normal everyday use, you won't even notice a difference.

Thanks- so what about the base 14-inch M3? I've heard the SSD on that is slower but again, is it just mostly on benchmarks or real-life performance?

 

[raythompsontn]

is it just mostly on benchmarks or real-life performance?

Benchmarks. In real life you will never notice. Unless you are copying a 200 gig file from one location to another. Day to day operations for most people it will not matter. If you are doing heavy video editing with CGI involved then SSD speed may be an issue. Saving 3 seconds every hour is not what I call significant.

 

[infohou]

There is a video discussed in another thread that shows in some situations the M3 Pro is much slower than the M2 Pro due to the bandwidth decrease.

 

[Abbas]

There is a video discussed in another thread that shows in some situations the M3 Pro is much slower than the M2 Pro due to the bandwidth decrease.

Any idea if this only applies to the 14-inch or 16-inch as well?

 

[ascender]

There is a video discussed in another thread that shows in some situations the M3 Pro is much slower than the M2 Pro due to the bandwidth decrease.

What video is this?

I'd be amazed if there's anything other than extreme edge cases where you'd notice this in real world use v benchmarks, unless its something which needs CPU/GPU cores which just aren't there now?

 

[jav6454]

Any idea if this only applies to the 14-inch or 16-inch as well?

Again, as another poster pointed out, you will loose out on mere seconds. It is not significant to affect which to buy.

 

[dgdosen]

Only to benchmarking software or workflows with heavy sustained writes to disk, otherwise, in normal everyday use, you won't even notice a difference.

If you move around 1-2 TB files pretty regularly, I think it'd be noticeable..