Hello,
I know there is no PCI card listed in your pdf compatibilty list (it's quite minimum..)
I am using a Asus MB (X99 deluxe2/3.1) and Asus PCI thunderbolt EX 3 is recommanded for thunderbolt 3 connecting....
I wonder if someone used a ASUS thunderbolt EX in the past to connect to a Pegasus DAS ?
Cheers! :)