I manage 10 rigs and just ran into an issue I have not experienced yet... I received 2x Dell branded RX470 4gb reference cards. They worked fine with the original bios but as soon as I flashed the 1500 straps now the cards are no longer recognized at all in Windows.

Win10
Gigabyte Z270XP-SLI

I tried changing PCI Gens, different slots, etc. Seems like the cards are bricked. I've flashed 50+ cards and this is the first time this has happened. What methods are you guys using to recover from something like this?

Thanks!!