i would just buy this, it gives you 2 ports and no headache. The Alpine ridge version, you need special bios/board for the newer Titan Ridge. https://www.amazon.com/GIGABYTE-GC-Titan-Ridge-Thunderbolt-Component/dp/B0722SV69N/ref=sr_1_fkmrnull...
if you got a spare drive, or if it dont matter much re-install windows. and see if you get the same errors. Thats what i do when i get strange problems that i cant figure out, usally works.
Guys please save yourself the headaches & hassles affiliated with ASUS's TB3 cards. After MUCH research & wasted time, I bought a Gigabyte Alpine Ridge "rev 2.0" (https://www.gigabyte.com/au/Motherboard/GC-ALPINE-RIDGE-rev-20#ov) & it works FLAWLESSLY & even has two TB3 ports. Excellent. Has never dropped not even once, in BIOS or Windows. This is on my ASUS X99 Deluxe II motherboard BTW which came with ASUS's crappy TB3 card which I pleasantly urinated on.
What I found with my ROG Maximus IX Hero was that Asus removed all of the complete Thunderbolt BIOS settings about 3-4 BIOS revisions back for some bizarre reason and left only basic settings.*
What this meant was that with using the latest BIOS it was impossible to get the card to work unless you used a two year old BIOS.*
Why they would do this I don’t know, but I wasted countless hours trying to get it to work and ended up selling it in the end.*
I’ve heard people have had a lot of success with the Gigabyte card but I’m concerned it won’t work on my MB which only has basic Thunderbolt settings.
With the Gigabyte Alpine Ridge 2 card, are you using it with the latest BIOS on your MB?
Also has Asus limited the Thunderbolt options in the latest BIOS like they have with my MB?