"Were you able to get the card to work on another PC?"
Yes, that's how I upgraded the firmware with the latest fix, unfortunately this PC is far from beeing powerful enough to run VR applications. The PCI bus on the motherboard/CPU is not broken either, I'm able to use these slots with other cards, there is really some kind of incompatibility.
Actually I recall that initially my system even refused to POST (error code 94 IIRC) when having the WiGiG adapter inside (using the original BIOS v1.10), after upgrading the BIOS it now boots properly but the card is just not visible.
This seem to be a known issue, from what I could read the workaround would be to use a PCI-E slot that is not connected directly to the CPU controller, but unfortunately there is no such slot available on my motherboard model.
That's very interresting, thanks for this information !
It's the first time that I hear about a potential link between the BCLK speed and this issue, maybe I'll try to tweak a bit around with it to see if this brings any improvement.