Black AN1500 NVMe x8 add in card - performing poorly

I just bought and installed my WD Black AN1500 SSD card. I was very excite to get 6,500 / 4,100 R/W performance from the new device.

However, I am getting about 1,700 / 1,200 instead. My TUF NVMe out-paces this considerably.

What can I look at which might result in improved performance?

It needs 8 lanes of PCIe 3.0 for best performance … So, what kind of motherboard and slots your system has?

Its running in a 16 lane slot.

motherboard is an ASUS WS C246 Pro (workstation board).

5 PCIe slots x16, x8, x8, x8/x4, x1, plus onboard M.2 (x2) for x4 NVMe and M.2 x2 SATA/Optane.

Processor is an i9-9900, 48GB of DDR4-2666.

It should scream.

So, put it in an 8 lane slot and see what is happening.

What cards you put into in the other slots?

I removed all the other cards in the system (NVMe adapater, Fusion-IO card, and a SAS HBA), went into the bios, and changed the PCIe bus setting from Auto to Gen3. Booted into windows and ran a crystal disk test. Card is now operating at full speed. Either having the bus set for auto or having a PCIe 2.0 Fusion-IO adapter in the system seems to have been slowing everything down.

It’s fine now.