512GB and 1TB SSD speed difference?

Sid The Kid

Suspended
Original poster
Jul 10, 2017
91
4
Hello,

An Apple Specialist on Live Chat told me that 512GB SSD and 1TB SSD have no difference in speed. Only on storage. Is it true?

But I think 512GB is faster than 128GB. What about 256GB?

But how can it be faster than another one?

Thanks
 

Glideslope

macrumors 603
Dec 7, 2007
6,341
3,414
A quiet place in NY.
IMO, in some instances the 512 is quicker, but only on a test. In real world, you won't notice. I have the 1TB in my 2017. It's 70% full. This is from today. It's roughly the same as the 512 test you'll see. Stress was set at 4g. :apple:
DiskSpeedTest.png
 

jzuena

macrumors 65816
Feb 21, 2007
1,037
65
The 512GB SSD in a 2017 iMac seems to be in the same ballpark as well.

Screen Shot 2017-08-06 at 7.37.21 PM.png
 

Fishrrman

macrumors Core
Feb 20, 2009
19,102
6,546
Kid, you're not going to notice "the difference" in real-world applications... ;)
 

kschendel

macrumors 65816
Dec 9, 2014
1,054
332
The small SSD's are slower in benchmark testing because of less internal parallelism, which is in turn due to fewer flash memory chips needed. Once you add enough flash chips to max out the number of streams that the particular SSD controller and board design allow, larger capacity doesn't run any faster. But that's mostly theory and benchmarking; in real life you would be hard pressed to detect the difference across sizes, even slowest to fastest.
 

Sid The Kid

Suspended
Original poster
Jul 10, 2017
91
4
IMO, in some instances the 512 is quicker, but only on a test. In real world, you won't notice. I have the 1TB in my 2017. It's 70% full. This is from today. It's roughly the same as the 512 test you'll see. Stress was set at 4g. :apple: View attachment 711789
Fast :0
[doublepost=1502146425][/doublepost]
The 512GB SSD in a 2017 iMac seems to be in the same ballpark as well.

View attachment 711846
Fast :0
Just for comparison ... here is my 2TB SSD in the 2017 iMac:

View attachment 711791
Fast :0
[doublepost=1502146548][/doublepost]
The small SSD's are slower in benchmark testing because of less internal parallelism, which is in turn due to fewer flash memory chips needed. Once you add enough flash chips to max out the number of streams that the particular SSD controller and board design allow, larger capacity doesn't run any faster. But that's mostly theory and benchmarking; in real life you would be hard pressed to detect the difference across sizes, even slowest to fastest.
Thank you for explaining.
[doublepost=1502146581][/doublepost]
Kid, you're not going to notice "the difference" in real-world applications... ;)
True :3
 
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