I Put Three AI Services on One 24 GB GPU. It Used 17.8. Here's What Fits. The Local LLM Lab — Part 9 One controlled experiment. One number. One verdict. The "how much VRAM do I need" advice on the internet comes in one flavour: a spec sheet. "27B in FP8 needs 28 GB. 70B in Q4 needs 42 GB. Buy a 48 GB card." That's the answer for one model. Nobody tells you what happens when you try to run your actual stack — a transcription service, an embedding model, a small chat model — o...