Ok guys finally here’s an update … it works !! As Wendell and gpio mentions the titan ridge thunderbolt card with the threadripper 2950x and a gigabyte x399 mobo works ! I had to power the titan ridge cards with two 6pin pcie power lines from my psu and also connected the thb_c header to the mobo. I had to install the thunderbolt drivers for windows 10 and it works as expected !