So I have a build with an ASUS x299 Prime Deluxe, and I am generally very happy with it. However, the Thunderbolt 3 connnectivity is provided through an add-in card that connects to a board header. My motherboard regularly "loses track" of it, and I have to go through a rigamarole of disconnecting and reconnecting, disabling in BIOS and re-enabling, and generally a lot of fiddly nonsense to get it to wake up to the presence of the TB3 card again. So when I saw that the new version of the same motherboard, the ASUS Prime X299-Deluxe II has built-in support for TWO TB3 connections, I got interested. However, I am getting whiffs of issues with how it is implemented, and if it really is full support. On the ASUS site itself, their marketing copy says, "Prime X299-Deluxe II integrates Thunderbolt 3 with up to 40Gbps of aggregate interface bandwidth". Aggregate? Does that mean it's actually 20Gbps per connection, instead of 40 through each?
Can anyone give me any insight into whether this is a good implementation or not?