Update: IT WORKS! (Free chinese RTX 3060 from Temu)

So, the GPU works! I installed the original Nvidia drivers without any issues, and the info in CPU-Z checks out. It's my first build, so I was surprised I didn't run into any problems. The hardest part was getting the wifi connection set up during the Windows install.

Someone in my last post mentioned that this GPU is actually a Biostar OEM model, and looking at the pictures you can tell it's true. The only difference is the Sejishi brand logo on the fan.

So far, I’ve only run one game, but everything seems to be working without any issues.