[Oblivion777]

I have an HDX3 system, the 3x cards sitting in slots 6-8. I used the Belkin Power Cable Set 1 and used the "PC" power cable that comes with HDX to power the three cards. However I cannot run PT2019.12 as the system doesn't recognize the hardware. I also tried to run DigiTest, but it crashes every time. I have re-installed the HD driver; still the same thing. I will try to take out all three cards and simply try them one-by-one and after all 3x will work individually I will try to pair them in an HDX2 system first and afterwards connect them all - so an HDX3. Does anyone have any suggestions or tips/tricks on how to troubleshoot this?

Oh by the way I have assigned PCIe Bus B to slots 6-8 where the HDX cards are and the rest to PCIe Bus A (graphic card, 2x UAD Octos and one PCIe SSD). So all my PCIe slots are used.

Also the internal USB slot in the MacPro is working just fine; I plugged in my iLok 2nd gen and all is well.