Still very poor Rtx 4090 perfomance

As the title says, we are still experiencing very slow perfomance on rtx 4090 cards(and probably some other cards to) we would really like to find a solution to this, this is why i am opening this topic. Any discussion, tips etc... are welcome

The issue names no file, command, model, benchmark, or reproducible setup. Start by collecting a reproducible RTX 4090 performance case and comparing it with an expected baseline; done means the cause is isolated and a verified performance improvement is documented.

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