internal SSD vs external NVME

[smoothnobody]

i have a 500mb read/write SATA6 SSD. i use it as a portable windows OS drive i plug in to different computers. i am considering buying a PCIE 4.0 NVME that does 5000mb read/write and a 10gbps external NVME case that connects through USB 3.1 type C. i'm assuming this will be a substantial upgrade, but want to make sure i'm not gonna hit some kinda of transfer limitation that prevents me from hitting those blazing fast NVME speeds. i've tried to do some google searching SATA6 vs USB 3.1 and wasn't really coming up with much but one thing that caught my attention is people saying SATA6 has better latency. hoping somebody who knows more about this can provide some solid info. thanks.

[dizmo]

PCIe 4.0 isn't worth it. Just get a regular NVME one if you can.

You also won't get those speeds. USB 3.1 is limited to 1250 mbps.

 

 

[LIGISTX]

Sorta regardless of the SSD speed, USB is not meant for IOPS of OS's. USB 3.1 will be a max throughput bottleneck, but more than anything its just not built for running OS's. Yes, it can work, obviously as your experience dictates. But USB is not meant for what your doing.

 

Thunderbolt would perform much better as that IS PCIe... But, most PC's don't actually have thunderbolt.

 

Bandwidth of USB 3.1 is 10 Gbps, which is 1.25 GBps. SATA III is 6 Gbps, which realistically never does more than ~550 as that is basically the max of any SATA drive (USB 3.1 won't really ever actually do 1.25 GBps either...). But, all of this is moot due to my first point. USB is not intended for the IOPS of running OS's and programs. There is a latency hit, but the entire USB pipeline isn't designed for this; SATA very much is, NVMe very much more is. @smoothnobody what is the reason for doing this..?

[smoothnobody]

3 hours ago, LIGISTX said:

what is the reason for doing this..?

to have a portable windows environment on multiple desktops without lugging around my desktop.

[LIGISTX]

3 minutes ago, smoothnobody said:

to have a portable windows environment on multiple desktops without lugging around my desktop.

I mean, yes. I understand the use case. But... why? Do you own the computers in question? Can't just rsync needed data between them vs booting from USB? Just trying to understand the reason for the use case to possibly offer alternatives.

[smoothnobody]

i own the computers. need a way to store and access large files between systems without drag and drop or internet. need to just plug it in and access a windows environment without any additional steps. i was booting windows from USB and everything was great until i upgraded to X570. the portable OS was setup on Z370 and now when i plug it in to X570 its unstable. probably gonna have to rebuild my portable OS on X570 and figured i would upgrade from 500mb to 5000mb.