24GB AMD GPU Struggles With Local Video Models: 2 Minutes for 2-Second 480p
OneMoreName1 · reddit · 2026-09-23
A Reddit user with a 7900XTX (24GB VRAM) reports painful local video generation: 2 minutes for just 2 seconds of 480p footage using LTX 2.5, with an estimated 20 minutes needed for 10-second clips. Even ComfyUI's default workflow crawled, sitting at 8% progress after 10 minutes for a 5-second 720p generation. They suspect the bottleneck is the NVIDIA vs. AMD (ROCm) gap, noting that other users claim a 5070 Ti finishes similar tasks in under a minute.
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