Here are the video reviews for the RX 7900 GRE posted so far. If you spot a new one, post it in the comments.
For the TL-DR crowd: This formerly Chinese exclusive card is a $549 GPU that competes against the RTX 4070. It offers similar performance in ray tracing titles, but is substantially faster in rasterization titles; even beating the RTX 4070 Super. Power draw is 260 watts, and there are no 2-slot wide models as of writing this. There is no AMD reference model.