this post was submitted on 16 Mar 2025
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Who is going to need that much power in a desktop PC? Nobody uses multiple GPUs for gaming anymore. If you are using them for GPU compute, you would be better off with server hardware and multiple power supplies.
Obviously to use a 4090 as a PhysX accelerator for a 5090: https://youtu.be/h4w_aObRzCc
Okay so the serious answer was actually multi-GPU workstation (using consumer/prosumer hardware despite your reservations): https://www.youtube.com/watch?v=hTnggqnC3ug