Hello! Posted this here before, but deleted it so that I could make sure I was safe legally. This post should also have more information as well.
I bought a "broken" RX 6900 XT on ebay, where the seller said they got it from a friend. From the pictures it looked like an RX 6900 XT LC (https://kinghossing.blogspot.com/2022/02/amd-radeon-rx-6900-xt-lc-liquid-cooled.html), which seemed like a pretty rare card. I put in an offer for around $230, and they accepted.
When I got it, I was surprised to see a bunch of pins, ports, and switches on the back of the card. It also had some stickers with numbers that didn't return anything, and one that says "Secure Typical XTX A0 ASIC." I know that this is probably some early revision/engineering sample, but I'm not sure what exactly it is.
I am wondering if it could be an engineering sample for the unreleased 6900 XTX, like this one: https://www.techpowerup.com/281394/amd-radeon-rx-6900-xtx-engineering-sample-pictured
I uploaded the VBIOS to techpowerup and it said it was unique, and right now I have it in a test rig trying to figure out drivers/performance issues. The seller stated that the core clock speed was stuck at 490 Mhz, and I saw the same issues with the most recent drivers. When I tried drivers from 2021, it fixed the clock speed issue, but the benchmark performance was still poor. Don't know if this is something I can fix with drivers/software or not, so if anyone has any ideas please let me know! I do not intend on making any permanent changes/repairs to the card.
I'm also not much of a collector, so don't plan on keeping it for long. It would be very cool to send it off to a content creator to be included in a video, so let me know if you have any ideas on people to contact!