VRAM vs Blackwell Speed: 3090 Ti or 5080 for Local Video Generation?
Apollorax · reddit · 2026-09-22
A Reddit user is torn between a 3090 Ti (24GB) and a 5080 (16GB), mainly for running MiniMax H3 and other video-gen models.
Key questions: how many video models actually fit in 16GB, whether 64GB of system RAM makes offloading painless enough for Blackwell's FP8/FP4 speed advantage to win, and whether NVFP4 weights deliver real-world gains. Comments split between "VRAM is still king" and "Blackwell speed wins anyway" — a useful buying debate for local video-gen setups.
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