VRAM
General/dictionary/vram
Definition
Video RAM on a discrete GPU. The hard ceiling on which models you can run: an RTX 4090 has 24GB, an A100 has 40-80GB, an H100 has 80GB. A 70B Q4 model needs ~40GB just for weights, before activations and KV cache. On Apple Silicon, unified memory plays the same role.
Related terms
Posts that use this term
- Troubleshooting local LLMs (and how to keep up after this series)
The full catalog of local-LLM failures: OOM, slow tok/s, garbage output, instruction drift, bad RAG hits, tool-call hallucination. Plus where to follow the field once you're on your own.
- Fine-tuning a model locally
When fine-tuning is actually the right call (it usually isn't) and how to pull off a LoRA run on a 16GB Mac, with a worked Llama 3.2 3B example.
- Every machine can run a local LLM (here's what fits)
A per-tier guide to running local LLMs in 2026, from 8GB integrated graphics to a 192GB Mac Studio. Specific models, specific speeds, specific configs.
- Picking a local model by task
The 2026 open leaders, sorted by what you actually want to do: coding, chat, the small-model crowd, structured output, vision, embeddings, and audio.
- Streaming, throughput, and the KV cache
Why TTFT and tok/s are different numbers, why streaming feels faster than it is, and the KV cache that makes the 1000th token cost about the same as the first.
- Quantization, distillation, pruning: how a 140GB model fits on your laptop
Three ways to shrink an LLM, and why one of them does almost all the work. What Q4_K_M actually means and what each shortcut costs you.
- The local-LLM vocabulary
Parameters, B, dense vs MoE, base vs instruct, tokens, context windows, chat templates, GGUF, and quant suffixes. Read it once and any HuggingFace model card stops being scary.
- The pitch for local LLMs in 2026
The case for running an LLM on the machine you already own. Privacy, no per-call cost, faster first token, no rate limits, and it works on a flight.
- Why Apple Silicon punches above its weight on local LLMs
Unified memory lets the GPU see all of RAM. Here's why that beats a discrete-GPU PC past 32B parameters, what fits in 16/32/64/128/192GB, and where Apple Silicon still loses.
- What it takes to run a model on your own machine
Why VRAM is the one number that decides whether a local LLM runs, what quantization really does to a model file, and the hardware ladder from an 8GB laptop to a 192GB workstation.
- The major LLMs in 2026
A field guide to the closed frontier models and the open weights you can actually run. What the "B" numbers mean, and which size fits your machine.
- Where AI actually runs: cloud, local, edge
When you use AI, a model file is sitting on a real machine. There are only three places it can be, and which one decides almost everything else.
- Install llama.cpp
Build llama.cpp from source with Metal or CUDA, then run a GGUF model with llama-cli. The closest thing to bare-metal local inference.
- Install Ollama
Get Ollama running on macOS, Linux, or Windows, pull your first model, and confirm it works with ollama list. The shortest path to a local LLM.