A6000 gpu issues

I’ve had a few issues using the recommended a6000 GPU driver with Unreal 5.7. Listing a few big ones below. Any recommendations? I’ve tried all three driver versions, all latest. Maybe I should downgrade? If I add a 4090, can I tell Unreal to just use that card?

  1. PCG megaplants. Trees dont appear, nor does the reference points you can turn on.
  2. Niagara 3d fluids dont display at all with default template. When I lower the particle count, they appear. Increase, they go away.