Samsung 970 EVO Plus Speed OK or Not ?

[mrSmith]

I have a Mojave-based system installed on 970 EVO Plus. All looks good on every speed tests, like Blackmagic (see a screenshot). Also I've installed iStat Menus which shows me that the write/read speed is limited near 450-500 MB/s during moving/copying files from external USB 3.1. or unpacking the large archives from this USB. But during checking this ssd by Blackmagic test (or others) iStat Menus shows me pretty the same speed as in testing apps (2800 MB/s). USB 3.1 port looks normal (5GB/s is showing in system info) Does my system working with some limits or this is normal ?

 

[MacMutsch]

If your USB port have 5Gb/s (GigaBIT/s) that it can read max 625 (megabyte/s) but this is theoretical with the USB overhead 450-500 is OK. BUT that mean that your USB port runs as USB 3.0 not 3.1 (10 Gigabit/s)