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Got HY4 Preview Q4_K_M running on a 4090. ~15GB VRAM usage

This story is from 2026-09-03. It is preserved in the archive; the latest stories are on the live feed.

I got the Q4_K_M build of HY4 Preview running locally with llama.cpp on an RTX 4090. The model is 14.12 GiB, and during inference I’m seeing around 15,120 MiB (~14.8 GB) of VRAM usage out of 24 GB. So I still had roughly 9GB left over. I was mainly curious about how usable the 3D/spatial side would…

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  1. 2026-09-03 09:56 · r/LocalLLM
    Got HY4 Preview Q4_K_M running on a 4090. ~15GB VRAM usage

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