@Inqnuam Did you use a raspberry pie to flash and did you use anything other than the clip and the breakout board?
@snoby
I have flashed the TB3 chips on two Gigabyte Designare Z390 boards, two GC-Titan Ridge boards, one GC-Alpine Ridge board, one ASRock Z390 Phantom Gaming-ITX/ac board, and one Intel NUC 7 board. All using a Raspberry Pi 4.
I can confirm that this can be a very
challenging experience.
I used the Pomona 5250 clip initially which seemed to work well on most boards. When I tried that clip on the NUC 7 it just wouldn't grab that chip properly. I then moved to the "cheaper" clip CaseySJ suggested in his wonderful flashing mini-guide which grabbed the NUC 7 chip better.
At one point I decided to try to re-flash the NUC 7 back to the original firmware. I never could get the chip to be recognized. I tried different clips, different wiring, PSU plugged in, not plugged in. Literally at least 15 - 20 tries. Each try is time consuming - getting the clip "perfectly" attached, booting the RPI, entering the terminal command, and finding the chip wasn't recognized, shutting down the RPI, re-clipping.....
I finally just (temporarily) gave up and left the NUC 7 with the modified firmware which isn't much, if any, improvement over the original firmware.
I thought perhaps I had damaged the RPI by shorting one of the connectors to it. So I purchased another RPI which at some point I will try again to see if it works.
I also bought some spare clips. It looks like the tiny connectors that attach to the chip are very fragile and may become mis-aligned.
So sometimes it takes
some people extreme perseverance to flash those darn chips. But it feels SO good when it works!
Good luck!