ok...So when you upgraded to X3x...Did you do a complete reinstall of Win?...
Here is my problem...I was trying out this Thunderbolt system with many DAWS...It was working sort of smashingly...until I started getting into the use of my plugins...
I cloned the Drive from a different system, which brought the Machine ID along with it, into the new Board and builds I now have/had in use below, in my spec.
On the old system, Acid Pro 7.0e continually crashed....And screwed up a lot of data in the OS, with data dumps, and Sonar along with it...So as to cause issues with other things, when I used it.
Any way the new Build with the cloned drive...I had a tech geek in to try to solve the error events...Not Possible, using Arconis bare metal backup, to fix the machine ID...which it did do!...the os was corrupted...but it worked fantastically for awhile in record mode and play back in sonar x3e..with thunderbolt and firewire adapter.
I got MS to remote view...Again not possible to solve for the issues the board and its drivers were throwing up in error reports in event viewer, with the cloned drive.
So I did a Bios update, reinstalled the OS win 7 64 bit...And then tried to put all the new drivers for the board, downloaded from ASUS....Some of those Drivers would not install properly....So as a Raw Build, I went back to MS Tech support , to have them Remote control, and seek out the issues...With nothing installed other that Drivers that would install, and those that would not, and some MS updates....It took 4 days to solve with a level 3T tech ...and get the system working properly.
Just installing Drivers...MS did something in the device manager...to show Ghost Devices...Not sure what he did...but I could see solid devices, and some kind of greyed out...The greyed out ones were Ghost device drivers put in, that were conflicting with the installed Drivers....As I tried several times to install what I thought were the most up to date Drivers for my Motherboard...which seemed not to want to install on this system they were designed for.
MS is still scratching their heads, Most likely?
So you see...It is not always the Software, or the OS, or the Board, or devices upon it....Sometimes it is Just Pilot error...Sometimes it is all of the above....
So no worries...There are ways to find out....Just have to make the move...and dig in..or do not ...the problem remains...only until solved for....And for that solution someone with the issue has to dig into it...and post up...all info as best they can...or tell the builders...or get a tech head onboard to seek out ...
Just saying...Somethings are not always evident to the eye of the beholder, until uncovered by those who see, or have the tools to do so , and know how to use them!....
Again nothing But blessings, in wishing you that Bliss we all seek!