How much VRAM does Hermes 3 405B need?

Hermes 3 405B requires 230 GB VRAM to run at Q4 quantization (recommended), 405 GB for Q8, and 810 GB for full FP16 precision. The minimum is 115 GB at Q2 with some quality loss.

What GPU do I need for Hermes 3 405B?

You need at least 230 GB VRAM to run Hermes 3 405B at Q4 quantization. 0 consumer GPUs are compatible. The most popular choice is an NVIDIA RTX-class GPU with 230+ GB VRAM.

Is Hermes 3 405B free to use?

Hermes 3 405B by Nous Research is available under the llama-3.1-community license. Check the license terms for commercial use restrictions. You can download and run it for free with Ollama: ollama run hermes3:405b

Local Engine Ready

Hermes 3 405B

Name: Hermes 3 405B
Author: Javier Morales

Hermes 3 405B works with 2 GPUs via CPU offloading. Precise VRAM thresholds and benchmarks below.

0 Compatible GPUs

2 with offloading

405B params

131K context

Top pick

M4 Ultra · 128 GB VRAM with offloading

Check availability See top 3 ↓

Prices and availability may change · affiliate link

Javier Morales AI hardware specialist — 8 years of experience Aktualisiert 2026-04-08

GitHub: github.com/javier-morales-ia

llama.cpp 0.2.x · CUDA 12 · ROCm 6 · updated monthly · methodology →

Execution Context

ARCHITECTURE TRANSFORMER

CONTEXT 131K TOKENS

QUANTIZATION 4-BIT GGUF

PROVIDER Nous Research

LICENSE llama-3.1-community

VRAM REQUIREMENT

230 GB

4GB 8GB 12GB 16GB 24GB+

Hardware Decision

This model requires aFlagship GPU (48 GB+ VRAM)

Minimum

M4 Ultra

Runs at Q4 — functional, some wait

128 GB VRAM offload

View compatible setup

Balanced

M3 Ultra

Best value for daily use

192 GB VRAM offload

View compatible setup

Optimal

M3 Ultra

Full quality, fastest inference

192 GB VRAM offload

View compatible setup

Compatible GPUs for Hermes 3 405B

Best picks by compatibility, VRAM headroom, and value — prices and availability may change.

128 GB VRAM · Offloading Amazon

M4 Ultra

0.0 (0 Bewertungen)

Vorteile

Works via CPU offloading
128 GB VRAM — adequate headroom

192 GB VRAM · Offloading Amazon

M3 Ultra

0.0 (0 Bewertungen)

Vorteile

Works via CPU offloading
192 GB VRAM — adequate headroom

M3 Ultra auf Amazon ansehen →

Einige Links sind Amazon-Partnerlinks. Wir koennen ohne Mehrkosten fuer Sie eine Provision erhalten. Amazon-Cookies koennen nach Ihrem Klick bis zu 24 Stunden bestehen.

Check if your GPU can run Hermes 3 405B →

VRAM Calculator — instant compatibility check

M4 Ultra

128 GB · Works with offloading · Check availability

*Prices and availability may change. Some links are affiliate links.

System Requirements

GPU VRAM 230 GB High-end GPU

System RAM 345 GB 64 GB or more

Storage 230 GB Q4 · SSD recommended

CPU Any modern CPU GPU required

VRAM by Quantization

Quantization	VRAM needed	Disk space	Quality
FP16 (max quality)	810 GB	810 GB	Maximum
Q8 (high quality)	405 GB	405 GB	Near-lossless
Q4 (recommended) Best balance	230 GB	230 GB	Recommended
Q2 (minimum)	115 GB	115 GB	Quality loss

Model Details

Developer	Nous Research
Parameters	405B
Context window	131,072 tokens
License	llama-3.1-community
Use cases	agent, function-calling, reasoning, chat
Released	2024-09

Install with Ollama

ollama run hermes3:405b

Hugging Face

NousResearch/Hermes-3-Llama-3.1-405B

View on HF →

Technical Requirements

Can your GPU run Hermes 3 405B?

Hermes 3 405B needs <strong class="text-amber-400">230 GB VRAM</strong> at Q4 — no consumer GPU fits fully. 2 GPUs work with CPU offloading at Q2 (115 GB).

115GB Critical min

230GB Optimal Q4

405GB High Quality Q8

810GB Max FP16

Hardware Performance Matrix

0 Q4 native · 2 offload

GPU Unit	VRAM	Compatibility	Est. Speed	Action
M4 Ultra	128GB	Offload	45 tok/s	Calculate →
M3 Ultra	192GB	Offload	38 tok/s	Calculate →

Recommended GPUs for Hermes 3 405B

Reale Benchmarks

Keine bezahlten Reviews

Redaktionelle Auswahl

Datenbasiert

Best picks by compatibility, VRAM headroom, and value — prices and availability may change.

M4 Ultra

128 GB VRAM

Offloading

Check availability →

M3 Ultra

192 GB VRAM

Offloading

Check availability →

Einige Links sind Amazon-Partnerlinks. Wir koennen ohne Mehrkosten fuer Sie eine Provision erhalten. Amazon-Cookies koennen nach Ihrem Klick bis zu 24 Stunden bestehen.

Hermes 3 405B — Compatibility guide

Hermes 3 405B with 405B parameters only runs fully in multi-GPU or server configurations. Consider distilled versions if available. The VRAM calculator can help you find compatible alternatives.

Compatible Hardware

GPUs that run Hermes 3 405B at Q4 — sorted by AI performance score.

Reale Benchmarks

Keine bezahlten Reviews

Datenbasiert

No consumer GPUs have enough VRAM for this model.

Consider distilled versions or Q2 quantization.

Einige Links sind Amazon-Partnerlinks. Wir koennen ohne Mehrkosten fuer Sie eine Provision erhalten. Amazon-Cookies koennen nach Ihrem Klick bis zu 24 Stunden bestehen.

More Practical Alternatives

Similar models in the agent category with comparable VRAM footprints.

Hermes 3 70B

70B params • 40GB VRAM

Nous Research • llama-3.1-community

Hermes 3 8B

8B params • 5GB VRAM

Nous Research • llama-3.1-community

Hermes 2 Pro Llama-3 8B

8B params • 5GB VRAM

Nous Research • apache-2.0

Not sure which GPU you need for Hermes 3 405B?

The VRAM Calculator tells you exactly which quantization your hardware can handle.

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