I'm considering giving my current DAW desktop to my daughter for her home business as she has an old Q6600 CPU machine that's on its last leg.  That means I have to build a new DAW desktop.  I've seen comments about the 8700K and 8086K CPU's on other forum threads. But what about a motherboard with Thunderbolt?  I see some that have it as a PCIe card add in, but is there any with it totally built in that does not need an added card?  I don't have Thunderbolt now but who knows in the future. 
 
Thanks/Jack
 

I recently built mine and for those 2 chips the only two motherboards that had Thunderbolt 3 support were the ASUS Prime X299-A and the GIGABYTE Z370 AORUS GAMING 7-OP LGA 1151. Neither had the card included or Thunderbolt built in. I went with the GIGABYTE which also included 32GB OPTANE memory which I found to be a pain to configure especially since my first one failed and had to RMA with Intel. There are 2 versions of the motherboard, one with Optane (-OP) and one without. At the time I bought it the -OP was actually cheaper. Once working, it really does speed things up. I also went with the 8086k based on comments/hints made by Jim.

You'll find that most current generation motherboards do not have the Thunderbolt-3 controller onboard.
ASRock, Gigabyte, and Asus all have moved to an optional AIC (add-in-controller).
 
Make sure the motherboard specifically has a Thunderbolt-3 header.
Make sure the BIOS specifically supports the Thunderbolt-3 AIC.
Make sure you can source the specific Thunderbolt-3 AIC.  There are times when stock is hard to find.
 
Depending on the Thunderbolt audio interface (most are still Thunderbolt-2), you'll need a Thunderbolt-3 to Thunderbolt-2 adapter.  Several audio interface companies (including Presonus) recommend the StarTech adapter.  The Apple adapter is about $20 less, is easy to source, and has worked in every scenario we've tested (lots of different laptop/desktop configurations).  The Apple adapter works just fine with the Presonus Quantum (I'm running that combination here).

Thanks for the info.  I looked at ASUS and Gigabyte.  They have motherboards with Thunderbolt headers that require the PCIe card.  Thanks for the heads up on the BIOS.  
 
The ASUS Prime 370A supports Thunderbolt 3
 
I have an Apple Thunderbolt 3 to 2 adapter, that was give to me.  Its been in my "junk" drawer as I didn't have anything to use it with.
 
 

I have the Asus Prime Z370 A motherboard. It is rock solid and easy to manipulate. Sonar Splat and CWbyBL runn smoothly.
 
I have not made use of the thunderbolt part but knowing it's there, like you mentioned. is one of the reasons I bought this board. Lots of options and also gt a live person for support the first time I called.

Stratman, I've also been looking at the Prime 390A.  About the same as the  370 except will also support 9th Gen  CPU's. $20 difference in price.
 

I just got a newsletter and one of the articles was on a new Gigabyte Z390 motherboard and it has built in native Thunderbolt with 2 40GB TB3 ports on the rear motherboard I/O panel.
https://www.tweaktown.com/news/63699/gigabyte-details-awesome-new-z390-designare-motherboard/index.html
 

I have used Asus MB's for decades just because they work for me and are not overly expensive. My other choices if I had to would be MSI or Gigabyte.
 
But I didn't want to spend more that the $155 I paid for the Asus board. 

The Z390 only difference is it has built in wifi, which I hate. Both the 370 and 390 support 9th gen intel
Interesting article about the 9th gen intel stuff
 
https://www.anandtech.com/show/13401/intel-9th-gen-cpus-9900k-9700k-9600k
 
I still believe that the wattage difference creates a heat difference. IOW, 65watt 8700 vs a 95w 8700K. You really need a better cooling system. The heatsink\fan that ships with the intel sf is a joke, especially for the K models.
 
The 9th gen intel ff for the most part are 95watts. I mean I have a great case and killer cooler, so I really don't need to worry. I guess I just am Over cautious 

If/when I build a new system I'll use liquid cooling.  My current build i7 6700K is using a Deep Cool "Captain 120EX" liquid cooler.  The CPU idles around 30 deg C.  I tried a Noctua CPU cooler with two fans Initially with the 6700K but the CPU idled around 40 deg C and didn't take much to jump up in the 50's, plus It was so big it touched the case side panel.  The Captain 120EX fan is as quiet as a Noctua.