Resolved Slow nvme, Link Width: x1, why?

[Macmillennial]

Hi!
I've just installed a PCI-E x4 nvme adapter with a 3x4 NVMe ssd.
My cMP 5,1 with macos high sierra show it is only 1x and performances are low (about 400Mb/s).
Any idea on what is the issue?



Hardware Overview:
Model Name: Mac Pro
Model Identifier: MacPro5,1
Processor Name: Quad-Core Intel Xeon
Processor Speed: 2,93 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 8 MB
Memory: 16 GB
Boot ROM Version: 144.0.0.0.0
SMC Version (system): 1.39f5
SMC Version (processor tray): 1.39f5


Intenso Premium:
Capacity: 250,06 GB (250.059.350.016 bytes)
TRIM Support: Yes
Model: Intenso Premium
Revision: 1002A
Link Width: x1
Link Speed: 5.0 GT/s
Detachable Drive: No
BSD Name: disk0
Partition Map Type: GPT (GUID Partition Table)
Removable Media: No

pci126f,2263:
Type: NVM Express Controller
Driver Installed: Yes
MSI: Yes
Bus: PCI
Slot: Slot-2
Vendor ID: 0x126f
Device ID: 0x2263
Subsystem Vendor ID: 0x126f
Subsystem ID: 0x2263
Revision ID: 0x0003
Link Width: x1
Link Speed: 5.0 GT/s

 

[Macmillennial]

Figured out that the card is 1x, not 4x as advertised

 

[joevt]

Figured out that the card is 1x, not 4x as advertised

What card is that?