NVIDIA graphics card · previous_gen · data 2026-10-15

GeForce RTX 4090 for local AI.

Name: GeForce RTX 4090
Brand: NVIDIA

With 24 GB it runs Qwen3.8 27B (needs 22.7 GB). 56 models fit. Published speed: gpt-oss-20b at 242.6 tokens/sec.

Memory24 GB

vram

Bandwidth1008 GB/s

Higher means faster answers.

PriceFrom about $3,099

As of 2026-10-02. Check before buying.

Which models fit

By memory option.

Usable: 75% on Macs and shared-memory PCs, VRAM minus 1 GB on graphics cards (estimates).
Memory	Usable	Models that fit	Best three
24 GB	23 GB	56	Qwen3.8 27B (22.7 GB), Qwen3.5 27B (21.5 GB), Qwen3.6 27B (21.5 GB)

Speed

Published speeds.

Measured by others, with sources. Not our tests.

Model	Tokens/sec	Engine	Setup	Source
gpt-oss-20b	242.6	llama.cpp · Q4_K_M	RTX 4090 + EPYC 7642 (chat-short)	community-measured · 2026-10-15

Questions

Short answers.

What is the best local LLM for the GeForce RTX 4090?: With 24 GB, Qwen3.8 27B (needs 22.7 GB, AA 33.7). 56 of 124 models fit.
How fast is the GeForce RTX 4090 for local AI?: Published: gpt-oss-20b at 242.6 tokens/sec (llama.cpp, RTX 4090 + EPYC 7642 (chat-short)). These are other people's measurements, not ours.
How much does the GeForce RTX 4090 cost?: From about $3,099 (as of 2026-10-02). 2026 prices are inflated by the memory-chip shortage; check before buying.

Specs from Wikipedia – List of Nvidia GPUs (spec tables) (2026-10-15). Prices are approximate and dated; 2026 prices are inflated by the memory-chip shortage.

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# GeForce RTX 4090 for local AI

URL: https://insidethemachine.ai/machines/rtx-4090
Type: NVIDIA graphics card. Chip: RTX 4090. Memory: vram, options 24 GB. Bandwidth: 1008 GB/s. Spec source: https://en.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units (2026-10-15).
Price: from about $3,099 (2026-10-02, approximate). Status: previous_gen.

## Which models fit

| memory GB | usable GB | models that fit | best 3 |
|---|---|---|---|
| 24 | 23 | 56 | Qwen3.8 27B (22.7 GB), Qwen3.5 27B (21.5 GB), Qwen3.6 27B (21.5 GB) |

## Published speeds (not our tests)

- gpt-oss-20b: 242.6 tok/s decode, 593.8 tok/s prompt (llama.cpp, Q4_K_M, RTX 4090 + EPYC 7642 (chat-short), community-measured) https://llm-speed.com/m/gpt-oss-20b (2026-10-15)

Notes: Used price is a single clean eBay sale (insufficient sample, flagged by the dataset author). Treat as very rough.

## Questions

**What is the best local LLM for the GeForce RTX 4090?**
With 24 GB, Qwen3.8 27B (needs 22.7 GB, AA 33.7). 56 of 124 models fit.

**How fast is the GeForce RTX 4090 for local AI?**
Published: gpt-oss-20b at 242.6 tokens/sec (llama.cpp, RTX 4090 + EPYC 7642 (chat-short)). These are other people's measurements, not ours.

**How much does the GeForce RTX 4090 cost?**
From about $3,099 (as of 2026-10-02). 2026 prices are inflated by the memory-chip shortage; check before buying.