NVMe M.2 Cardea Zero Z440 on linux SLOW

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2 Dec 2019
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Got this Team Force Cardea Zero NVMe PCIe Gen4 drive, performance isn't what was promised.

https://www.teamgroupinc.com/en/product/cardea-zero-z440

They say write speeds of 4,400 but I am not even seeing half that.

Code:
$ dd if=/dev/zero of=/tmp/test1.img bs=1G count=10 ; rm /tmp/test*.img
10+0 records in
10+0 records out
10737418240 bytes (11 GB, 10 GiB) copied, 5.86318 s, 1.8 GB/s

Using Linux Ubuntu 18.04.3

I have ROG Zenith II Extreme which supports PCIe4 (Gen4) NVMe drives like this.

Any ideas?
 
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