Valeon 17" USB Speed with external m2 NVME enclosure - SLOW?

[superconfirm]

Hi All.
I'm getting the following speed for external M2 NVME Gen 3 2TB .

It's a Sabrent enclosure

https://amzn.eu/d/7jF67VG

• M.2 SSD ENCLOSURE: The USB C M.2 NVMe USB adapter uses USB 3.2 Gen 2 and Supports UASP acceleration protocol, the theoretical data transfer rate is up to 10Gbps. making it 70% faster read speed and 40% faster write speed than traditional USB 3.1. your drive's real-time read/write speed can reach up to 1000Mbps.

SSD is pretty slow but works!:
2TB Toshiba KIOXIA Exceria G2 SSD, M.2 (2280) PCIe 3.0 (x4) NVMe SSD, 2100MB/s Read, TLC 1700MB/s Write, 360k/400k IOPS 7WAE9

Also tried but similar performance:

Verbatim VI5000 2TB SSD M.2 PCIe Gen4 NVMe 5,000 MB/s read and 4300 MB/s Write Internal Gaming SSD - Solid State Drive​

Valeon specs quoted by PCS:
USB/Thunderbolt Options
1 x USB 3.2 PORT (Type C) + 3 x USB 3.2 PORTS

Have tried all Type A ports & USB C port. Any ideas why it's so slow? Getting around 3Gbps for internal M2's despite one being old Gen 3?

I need to free up one of the internal M2 bays to connect to Oculink GPU, so was planning to use external M2 instead of internal as D: drive.

Maybe I'm being thick?

Cheers
Bill

Cheers
Bill

 

[TonyCarter]

The theoretical limit of that USB 3.2 Gen 2 interface of 10Gbps (10 gigaBITS/second) which equates to about 1GBps (gigaBYTE) of real world read/write performance (theoretically it's 1.25GBps, but there's a protocol overhead that takes about 20%) and you're getting close to that with 0.96GBps read and 0.85GBps write (write is always slower).

Remember 1 GB (gigabyte) is 8x 1Gb (gigabit).

Your question about the same drive fitted internally forgets about the bit vs byte sizing, so a PCIe 3.0x16 m.2 slot on a motherboard that has a theoretical limit of 16GBps (gigaBYTES), and even a PCIe 3.0x4 slot with 4GBps throughput, would easily accommodate a gen 3 m.2 with a 3000MBps read/write as that's only about 3.5GBps, so the gen 3 m.2 is the limiting factor when fitted internally.