in todays news the h800, a800 and for the first time, a consumer GPU, the rtx4090, have all been added to the banned list. Nvidia can no longer sell these to China
So hopefully that helps with rtx4090 supplies
Nvidia is in a bit of pickle because this means any future consumer GPU as fast or faster than the rtx4090 is likely to be banned as well so they are more and more limited in what they can sell. No word yet if AMD consumer GPus are affected but the 7900xtx is significantly weaker than the rtx4090 is the workloads the US government cares about. That being said ROCm is getting updates from AMD to improve AI and ML performance which gets the 7900xtx closer to being banned