Hello Chuck,
don´t know if every thunderbolt A/C connector is 
working on windows systems , there seem to be some special requirements.
 
I have to investigate this article :
https://support.focusrite.com/hc/en-gb/articles/213525925-Clarett-Windows-Getting-Started
 
thank you

If I understand right ,
thunderbolt 3 ports are not official supported,
but 1 and 2  work !?
Your mobo seems to work with a clarett interface.

stevenpanter
I'm using a Focusrite Clarett 8-pre on Windows 10 with an Asus motherboard and thunderbolt card and this works fine at a latency of 1.8ms. So it can be done but I think I'm right in saying that you need Windows 10.
 
Now if Focusrite would just get around to updating their Windows drivers so that they are no longer in beta...

I have no doubt about Thunderbolt's speed but that seems an unrealistic RTL figure, do you mean 1.8ms ASIO buffer size? How many samples and what is your samplerate?

chuckebaby
yup, even my older ASrock z97 pro Motherboard has a Thunderbolt AIC Connector
http://www.asrock.com/mb/Intel/Z97%20Extreme6/?cat=Specifications

Microsoft does not support "PCIe via Thunderbolt" with Thunderbolt-2 controllers (only Thunderbolt-3).
 
Thunderbolt works great under Win10... but you've got to meet all the following conditions:

• Motherboard that has a Thunderbolt-3 controller (provides Thunderbolt-3 via USB-C port)
• Up-to-date install of Win10
• Audio interface driver needs to support "PCIe via Thunderbolt" under Windows 10
• Thunderbolt-3 (USB-C) to Thunderbolt-2 adapter - all Thunderbolt audio interfaces are currently Thunderbolt-2

Don't assume that because your motherboard has USB-C port/s that it has a Thunderbolt-3 controller.
USB-C ports can carry Thunderbolt or USB-3.1.
Many motherboards have USB-C ports for USB-3.1... but don't have a Thunderbolt-3 controller.
 

Any audio interface connected via Thunderbolt-2 controller (under Windows) is running Firewire protocol via Thunderbolt (not PCIe via Thunderbolt - which is what you need for PCIe level performance).
 

Directly from the Focusrite website:
 
Known issues:
- Glitchy audio/enumeration issues when using Thunderbolt 3 connections via an adapter. Please note that Thunderbolt 3 connectivity is NOT yet supported.
- Cubase 8.5 crashes after the save when closing down a project with MIDI tracks.
- Driver installer optimisations

At this moment...
MOTU, RME, and UA all have "PCIe via Thunderbolt" drivers actually available for Win10.

Considering all these ifs and buts, and the great performance of many USB2 interfaces, one might wonder why you'd actually trouble yourself with a Thunderbolt one unless your I/O needs are very high or the interface you're considering has other desirable features.

I can't shake the feeling that many people feel like a TB card will give them better latency figures just because it's TB, same as with USB3.

stevenpanter
I'm using a Focusrite Clarett 8-pre on Windows 10 with an Asus motherboard and thunderbolt card and this works fine at a latency of 1.8ms. So it can be done but I think I'm right in saying that you need Windows 10.
 
Now if Focusrite would just get around to updating their Windows drivers so that they are no longer in beta...

@ Which Asus Motherboard and Thunderbolt card are you using?

PCIe level performance allows super small ASIO buffer sizes (as low as 16-samples with some hardware).
That's the only real advantage to Thunderbolt (if all conditions are met).
 
All the talk about bandwidth is meaningless... unless you're running a large commercial facility and working at high sample-rates.  24 channels of I/O isn't near saturating the bandwidth of USB-2.
 
The UA Apollo Thunderbolt series is nice (average noise-floor is about -116dB).
However, the lowest ASIO buffer size is 32-samples... and yields round-trip latency right about equal to the RME Fireface UFX at a 48-sample ASIO buffer size.
 
If you decide to go Thunderbolt, you've got to read all the fine print.
Otherwise, you may be disappointed... or (worse) have a non-functional combination.