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Complete beginner — 2x RTX 3090 vs RTX 5080 vs Radeon AI PRO R9700 for local AI image/video generation?

I’ve got an old Pc to turn into a dedicated server: 32GB DDR4, 1TB SSD, Linux. i7 9900k The thing that’s making this hard is pricing. Locally I can get two used 3090s for about the same money as a single 5080 or a single R9700. So 48GB of old VRAM vs 16GB of new VRAM vs 32GB of AMD. What I’m not su…

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  1. 2026-10-27 15:14 · r/comfyui
    Complete beginner — 2x RTX 3090 vs RTX 5080 vs Radeon AI PRO R9700 for local AI image/video generation?

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