For sure there's no need to use 420-450W if the same performance is possible from 320-340W. Or 98% performance at 280W.I know that’s the case for gaming, but is it the same for rendering? (also got a 4090)
Looking at some benchmarks, it seems it's a lot faster than the 3090:
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Not sure how Daz3D compares to Blender but ok.