Question Gigabyte B360N WIFI / Asrock H370M ITX/ac and QNAP QWA-AC2600 wireless card

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Hi,
I'm currently building a new system for an OPNSense based router.
For this I wanted to use the Gigabyte B360N WIFI, an intel i3 8100, 8GB RAM and the QNAP QWA-AC2600 wirelss card for using with hostapd in order to create a wifi-network.
But it seems like, the card will not work with the board, as the board doesn't detect the card (not in bios and not in linux)

What I tried until now:

• Changing the Gigabyte B360N WIFI to an Asrock H370M ITX/ac, didn't change the behaviour -> As on the Gigabyte the card isn't detected
• Trying different PCIe cards in the slot of the Gigabyte and Asrock (a GPU, an old PCIe SATA-Controller) -> everything works as expected
• Trying a different PSU as I found someone mentioning it in the web -> didn't change a thing
• Trying the card in an old system with an ASUS Maximus VI Gene -> card works as expected?!

I already tried to contact the vendors:

• Asrock: As other PCIe cards are working it's not a fault of the board.
• Gigabyte: Linux isn't supported at the board, when telling them I use windows: As other PCIe cards are working it's not a fault of the board.
• QNAP: Must be a problem of the board, as the card is working in the other system

Therefore I'm currently lost... I don't know how to get the card running. Any ideas?
What I'm find suspicious is the display of lspci - when the card is connected it get the following output:

00:00.0 Host bridge: Intel Corporation Device 3e1f (rev 08)
00:01.0 PCI bridge: Intel Corporation Skylake PCIe Controller (x16) (rev 08)
00:02.0 VGA compatible controller: Intel Corporation Device 3e91
00:12.0 Signal processing controller: Intel Corporation Device a379 (rev 10)
00:14.0 USB controller: Intel Corporation Device a36d (rev 10)
00:14.2 RAM memory: Intel Corporation Device a36f (rev 10)
00:14.3 Network controller: Intel Corporation Device a370 (rev 10)
00:16.0 Communication controller: Intel Corporation Device a360 (rev 10)
00:17.0 SATA controller: Intel Corporation Device a352 (rev 10)
00:1c.0 PCI bridge: Intel Corporation Device a33d (rev f0)
00:1d.0 PCI bridge: Intel Corporation Device a330 (rev f0)
00:1f.0 ISA bridge: Intel Corporation Device a308 (rev 10)
00:1f.4 SMBus: Intel Corporation Device a323 (rev 10)
00:1f.5 Serial bus controller [0c80]: Intel Corporation Device a324 (rev 10)
00:1f.6 Ethernet controller: Intel Corporation Device 15bc (rev 10)
02:00.0 Ethernet controller: Intel Corporation I211 Gigabit Network Connection (rev 03)

And without the card the follwing

00:00.0 Host bridge: Intel Corporation Device 3e1f (rev 08)
00:02.0 VGA compatible controller: Intel Corporation Device 3e91
00:12.0 Signal processing controller: Intel Corporation Device a379 (rev 10)
00:14.0 USB controller: Intel Corporation Device a36d (rev 10)
00:14.2 RAM memory: Intel Corporation Device a36f (rev 10)
00:14.3 Network controller: Intel Corporation Device a370 (rev 10)
00:16.0 Communication controller: Intel Corporation Device a360 (rev 10)
00:17.0 SATA controller: Intel Corporation Device a352 (rev 10)
00:1c.0 PCI bridge: Intel Corporation Device a33d (rev f0)
00:1d.0 PCI bridge: Intel Corporation Device a330 (rev f0)
00:1f.0 ISA bridge: Intel Corporation Device a308 (rev 10)
00:1f.4 SMBus: Intel Corporation Device a323 (rev 10)
00:1f.5 Serial bus controller [0c80]: Intel Corporation Device a324 (rev 10)
00:1f.6 Ethernet controller: Intel Corporation Device 15bc (rev 10)
01:00.0 Ethernet controller: Intel Corporation I211 Gigabit Network Connection (rev 03)

So device 00:01 is disappearing when no PCIe device is there and the second ethernet-controller gets a different number... I see this behaviour at both boards. So I think something is detected, but not initalized?
Kind regards

 

[Lutfij]

Have you tried working with the card on a donor system that is devoid of a wireless connectivity option(both via a dongle or built in WiFi)? Latest BIOS update for both the boards?

 

[Hexcode]

I tried it without the internal wifi card on both boards, but this didn't change anything 🙁

 

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Funny thing: it is running when I plug something like this https://www.amazon.de/dp/B078NSGYG9 inbetween.