is there any difference in performance or is it just the storage capacity the differe

[elyah]

512GB Pcle-based flash storge
1TB pcle-based flash storge do they both perform the same ? or is the difference just storage capacity. Thank you

 

[dirtnnasty]

Ssd speed rises slightly with capacity...

But just a little percentage...

 

[priitv8]

I understood from this forum, that esp the 1TB PCIe drive boasts almost double data throughput due to 4-lane PCI, compared to 2 lanes on all smaller disks.

 

[elyah]

TO the previous post thank you for your replies512GB is adequate storage for me just trying to justify if the performance different is enough for me to upgrade if the difference is little. I would definitely welcome saving the $500

 

[yjchua95]

TO the previous post thank you for your replies512GB is adequate storage for me just trying to justify if the performance different is enough for me to upgrade if the difference is little. I would definitely welcome saving the $500

A 1TB SSD has read/writes of around 1.2GB/s (source: 9to5mac)
A 512GB SSD has read/writes of around 750/650 MB/s (source: benchmarked my own iMac with a 512GB PCIe SSD).

In real life situations, the difference isn't noticeable, unless you do heavy 4K video editing. Since I do this with my EOS-1Dc, my Haswell rMBP's got a 1TB SSD.

The 1TB SSD is faster because it's got a 4-lane PCIe. All other capacities only have 2-lane PCIe.

 

[tymaster50]

if you aren't a power user, you probably won't notice it at all. Or not enough to justify the price.

 

[dusk007]

You need a Mac Pro with 12Cores to benefit from 1GB/s speed. On the slow mobile quad core the difference to 750MB/s is unnoticeable. It sounds like there is a difference but there really is not. Random speeds are pretty much the same and they determine responsiveness. In many situations you will be CPU bound long before you are SSD bound on 750MB/s.
The only thing that would be slightly faster is a direct copy from the very same file on the same drive, even if it is only a lightly compressed archive the CPU will limit the unpacking speed.
Other metrics that actually matter for performance are the same. Such as access times and random speeds.

 

[rev.b]

750 Mb Read/Write speeds are already overkill in a laptop.

 

[UBS28]

Ssd speed rises slightly with capacity...

But just a little percentage...

It's not a little difference, unless the SSD is bottlenecked by the connector. Higher capacity SSD's are also a lot more reliable.

----------

You need a Mac Pro with 12Cores to benefit from 1GB/s speed. On the slow mobile quad core the difference to 750MB/s is unnoticeable. It sounds like there is a difference but there really is not. Random speeds are pretty much the same and they determine responsiveness. In many situations you will be CPU bound long before you are SSD bound on 750MB/s.
The only thing that would be slightly faster is a direct copy from the very same file on the same drive, even if it is only a lightly compressed archive the CPU will limit the unpacking speed.
Other metrics that actually matter for performance are the same. Such as access times and random speeds.

I have to agree with this statement. It's nice that a 1 TB SSD can do over 1TB/s, but in most usage there will be no difference in performance since other stuff like access time and random speed determines the responsiveness.

 

[padapada]

... Random speeds are pretty much the same and they determine responsiveness. In many situations you will be CPU bound long before you are SSD bound on 750MB/s.

Spot on. In addition you can be network bound. And most of the time I am brain bound

 

[elyah]

Thank you all for your replies on this thread truly helping a newbie like me out a lot! Great info appreciate it!