I found this card http://www.frys.com/search?to=99&sqxts=1&cat=&sort=price%20asc&from=0&query_string=thunderbolt+pci+card&search_type=regular&fq=p10099997%2050.01*100
at Fry's electronics...Has anybody had any experience with this type of card...HP also has them now...Would like to use it with the Zoom TAC-25R -
http://www.sweetwater.com...cWWF9mIUdBwaAgSu8P8HAQ
Any thoughts?
Thanks!

I would guess it to work fine... Whether on the motherboard or plug in card, a port should be a port!

...and now with simple fixes such as thunderbolt <> FireWire, this one should be easy.

That said I would look for one that has a good manufacturer reputation...?

Thanks Keni!

FWIW, The link doesn't actually link to a specific product.
If you're talking about Asus or ASRock Thunderbolt 2 Add-in-cards:
These can only be used with specific motherboards that support that specific card.
IOW, You can't pop that PCIe Thunderbolt card in any motherboard and have Thunderbolt.
 
Aside from that, even if your motherboard supports one of these cards, you'll have Thunderbolt 2.
On the Windows side, there's no "PCIe via Thunderbolt" driver for Thunderbolt 2 controllers.
If you're running a Thunderbolt audio interface connected to one of these controllers, it's running Firewire protocol via Thunderbolt.  You'd just as well using a Firewire audio interface.
 
Billy Buck recently posted a link on this subject.
On Windows, "PCIe via Thunderbolt" drivers *are* available... but you've got to be running one of the few (literally just hit the streets) Z170x motherboards that supports Thunderbolt 3 via USB-C port.  You've also got to be running Windows 10.  Thunderbolt 3 claims backward compatibility with Thunderbolt 2 and 1... but Microsoft doesn't guarantee it.

The big advantage to Thunderbolt is being able to reduce the ASIO buffer size down to 32-samples... or even 16-samples (same performance level as the best PCIe audio interaces).
This yields sub 3ms total round-trip latency.
 
As a point of reference, the Fireface UFX yields 4.3ms total round-trip latency at a 48-sample ASIO buffer size/44.1k.
That's comfortably low for all but the most extreme of circumstances.

I guess the best bet right now is stick with USB 3.0 until the price comes down on all this stuff :)
Thanks for the advice!

There's also the issue of whether what you want to run on Windows Thunderbolt has drivers. I just checked with Focusrite about the status of Windows drivers for their Clarett Thunderbolt interfaces, and apparently they're still not approved by Apple and/or Intel.
 
I just gave up and went for a TASCAM US-20x20, which runs off USB 3.0. Round-trip latency + safety buffers is around 9 ms with complex projects.

http://www.newegg.com/Product/Product.aspx?Item=N82E16815548001
The ASRock card is finally out! :D

Anderton
There's also the issue of whether what you want to run on Windows Thunderbolt has drivers. I just checked with Focusrite about the status of Windows drivers for their Clarett Thunderbolt interfaces, and apparently they're still not approved by Apple and/or Intel.
 
I just gave up and went for a TASCAM US-20x20, which runs off USB 3.0. Round-trip latency + safety buffers is around 9 ms with complex projects.

 I wonder how long the Thunderbolt platform will last.  My Asrock board has TB2 support.  It seems like a crapshoot.

That ASRock AIC Thunderbolt 2 card has been "available" for a good while.
It's out of stock a lot...   
That's not going to provide Thunderbolt 3... nor the "PCIe via Thunderbolt" drivers that are necessary to reap the rewards of Thunderbolt.
 
Edited to clarify:
BTW, Latest generation USB 3.1 controllers have a total bandwidth of 32Gb/Sec (use 4 PCIe lanes).
This bandwidth is shared between ports.