04-28-2018, 05:31 PM
jdc wrote:
The only relevant posts are Lew, sekker, clay and fitz. All real world users.
The OS hitting the drive might happen, but newer MBPs don’t have a “SSD” like the one in your current MBP — which is prob maxes around 280 MB/s. The “flash” type drives in MBPs are getting 3000 MB/s — a 10X increase in speed.
"SSD" and "Flash" can be used interchangeably in this context... And Apple is phasing out the word "flash" from their tech specs since "SSD" is the more commonly understood word.
...A mid-2009 would have a SATA 3 bus (whole big kerfluffle about Apple having to issue a firmware update to unlock SATA 3 speeds), which would max out an average SSD. Could easily get 700MB per second.
The 2015 MBP (with > 256GB storage) can hit 1.4GB per second read speeds. Very fast, but only about twice as fast as the 2009 with 3rd party SSD upgrade. (The flash modules are slower with 256GB or less storage.)
If you're running High Sierra, you can easily detect a decrease in performance of a SSD in a 2015 "silver" MBP, especially if you're running the latest Office and Adobe apps. If you've got FileVault enabled with APFS, it's slow enough that you'll feel the difference with every task, even on a brand new 2017 MBP.
...And BTW: Apple striped two flash drives to get 3000MB per second on the new iMac Pro. You're not going to get that kind of speed out of a Mac laptop's flash drive.