13F6:8788 is the normal vendor:device, even for the Asus Xonar D2X. As I stated above, the subsystem ID is being read as 8788:13F6.

That said, I figured as such. I just couldn't find any information about this online, as I found different subsystem IDs listed for reference and other cards.

I tried finding the subsystem stuff in the binary driver, but couldn't find anything to edit.

I'll start the RMA process.

I sent in this card after an RMA request with Asus. I received the same card back with absolutely nothing telling me if the issue was resolved or not, whether it was the card or possibly the Asus motherboard I am using, and still having the same issue.

I really didn't want to buy this Asus gear, after the problems I had before. I figured after 5 years, and with the massive consumer electronics push they have going now, that their support would have changed and their products would have worked. I was mostly happy with my A7N8X-Deluxe - Was I wrong to buy Asus, or what?

I'm out $500 on defective hardware now, and I don't know what pieces are really defective. Unless someone else has a solution for this card showing the incorrect subsystem and not working with the drivers, either card-based or motherboard-based, I really can't do anything else but throw this in the trash.

EDIT: Can anyone use WCPREDIT and post their PCI configuration registers? Any other device shows proper subsystem vendor ID and subsystem device ID - only my Xonar D2X shows the same values as device ID and vendor ID. This card is obviously bad and Asus won't do anything about it.