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Best AI models that run on Quad RTX 3090 (used) build

NVIDIA · rack/large tower
Quad RTX 3090 (used) build
96 GB 92 GB usable 936 GB/s $6k
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📺 Reviews of Quad RTX 3090 (used) build

What models fit this build

Quad RTX 3090 (used) build has 92 GB of usable memory. Here's which open-weights model sizes fit at each quant, at ~8K context with an FP8 KV cache.

Largest comfortable fit: ~120B MoE at Q5 (~86 GB).

Model size Q2Q4Q5Q8
7–8B Fits Fits Fits Fits
13–14B Fits Fits Fits Fits
30–32B Fits Fits Fits Fits
70–72B Fits Fits Fits Fits
~120B MoE Fits Fits Fits Won't fit
~235B MoE Won't fit Won't fit Won't fit Won't fit
~670B MoE Won't fit Won't fit Won't fit Won't fit
1T+ MoE Won't fit Won't fit Won't fit Won't fit

✓ = the weights + FP8 KV cache fit within this build's usable memory at ~8K context. Longer context needs more — size any model in the picker →

Our picks for this build

Sourced from the State of Local AI snapshot — the model + quant + backend we'd actually deploy on this hardware today, with the recipe in the setup guide below.

Recommended

Mistral Medium 3.5 128B

128 B Modified MIT 🤗

Apr 30 2026. Western 128B dense with vision + 256 K context. 77.6% SWE-Bench Verified; first credible mid-tier open-weight from Mistral in months. Modified MIT.

≥80 GB Q4 15 t/s
  • SWE-Ver77.6%

Coding: Apr 30 2026 launch with built-in PR-opening coding agent. Western 128B-dense with vision + 256K — early r/LocalLLaMA reports treat it as a credible Cline driver but trailing Qwen 3.6-27B on real refactors.

Agent: Mistral's agent SDK is OK; in Open-Claude it handles ~20-min sessions reliably. Long-horizon ceiling still unclear pending community evals.

Also runs well

Qwen 3.6 35B-A3B (MoE)

35 B · 3B active Apache 2.0 🤗

Apr 2026 release. 35B / 3B active MoE — beats Gemma 4-31B on agentic coding, matches Sonnet on most vision tasks. Native 262 K context (extensible to 1 M), ~18 GB at Q4. The new local-coding king under 200 B.

≥22 GB Q4 120 t/s
  • HLE21.4%
  • TB251.5%
  • SWE-Pro49.5%
  • SWE-Ver73.4%

Coding: r/LocalLLaMA's pick for fast local coding on a 24 GB card at Q4_K_M — 3B active so it's snappy. Vibes-codes 'perfectly fine' in OpenCode/Claude Code per multiple weekly-megathreads. Simon Willison's pelican test (April 2026): 'Qwen3.6-35B-A3B on my laptop drew me a better pelican than Claude Opus 4.7' — still resonating in the community.

Agent: Solid in 5-15 tool-hop loops in Cline. Long-horizon (60+ min) Open-Claude sessions still lose thread — 3B active is a ceiling on planning. Note: Qwen-self-reported TB2 51.5 vs community 23-24% — gap is harness-driven (Terminus-2 vs little-coder agent).

Also runs well

Devstral 2 123B (dense)

123 B Modified MIT 🤗

Dec 2025. Mistral's purpose-built SWE agent — 123B dense, 256 K ctx, 72.2% SWE-Bench Verified, 32.6% Terminal-Bench 2.0. Optimised for Cline / OpenHands / Claude Code style loops. The strongest sub-200B coding agent on open weights.

≥80 GB Q4 16 t/s
  • TB232.6%
  • SWE-Ver72.2%

Coding: Best-in-class open-weights coding agent at sub-200B — purpose-built for Cline, OpenHands, Claude Code, Aider, SWE-Agent. Beats Kimi K2 Thinking and Qwen 3.6 27B on SWE-Verified at the 80 GB VRAM tier.

Agent: TB2 32.6 sits below the 65% threshold so still caps at agents:3 per site rule — but the only sub-200B model that can credibly drive Cline / Codex / Open-Claude end-to-end on real PRs. Not general-purpose; pair with a chat model for non-code work.

Setup guide for Quad RTX 3090 (used) build

Every known recipe for running a model on this build — sourced from the State of Local AI 2026-07-05 snapshot (2026-07-05). Pick the one that matches your model + quant, then follow the linked original write-up.

Recipes for Quad RTX 3090 (used) build
ModelDecode tok/sPrompt processingRecipeRuns
mistral-medium-3-5-128b@ Q4_K_M on llama.cppHF - bartowski (GGUF)
qwen3-6-35b-a3b-moe@ FP16 on vLLMGitHub - tfriedel (RTX 3090 lab)
devstral-2-123b@ IQ4_KSS (GGUF) on ik_llama.cpp (-sm graph, tensor-parallel)~15 est.@ 4K ~300@ 2KHF ubergarm Devstral-2-123B-GGUF discussion #2 (phakio, ik_llama.cpp 4-GPU)

Want to compare this against other builds? Open the live picker (Q2 / Q4 / Q5 / Q8 toggles) or see best build by budget.

See all recipes

Every open-weights model that fits, ranked by composite score

Composite blends benchmark averages (60 %) with editorial 0-5 ratings (40 %). Closed-frontier references mix into the ranking and stay amber-tinted.

Modeltg/sppTTFT @ 100KHLETB2SWE-ProSWE-VerAiderLCBGPQAMMLU-ProScore
Qwen 3 Next 80B-A3B (MoE)80 B · 3 B active · moe🤗
167 t/s3,600 pp55 s78.4%77.2%82.7%4920
15 t/s1,900 pp1.8 min77.6%4689
Qwen 3.5 9B9 B · dense🤗
89 t/s15,000 pp12 s65.6%81.7%82.5%4623
GLM-4.5-Air 106B (MoE)106 B · 12 B active · moe🤗
42 t/s3,600 pp55 s57.6%4488
DiffusionGemma 26B-A4B26 B · 4 B active · diffusion-moe🤗
120 t/s4,200 pp42 s69.1%73.2%77.6%4358
Mistral Small 4 119B-A6B (MoE)119 B · 6 B active · moe🤗
83 t/s3,600 pp55 s71.2%4301
40 t/s4,200 pp42 s24.0%59.3%53.5%77.2%83.9%87.8%86.2%4280
Qwen 3 32B32 B · dense🤗
34 t/s4,200 pp42 s65.7%65.5%4278
28 t/s1,900 pp1.8 min57.5%65.2%84.0%4171
Phi-4 14B14 B · dense🤗
60 t/s8,800 pp20 s56.1%70.4%4160
Qwen 3.6 35B-A3B (MoE)35 B · 3 B active · moe🤗
120 t/s4,200 pp42 s21.4%51.5%49.5%73.4%80.4%86.0%85.2%4084
Qwen 3.5 122B-A10B (MoE)122 B · 10 B active · moe🤗
50 t/s3,600 pp55 s25.3%49.4%72.0%78.9%86.6%86.7%4021
42 t/s3,600 pp55 s18.3%31.0%60.5%81.2%79.2%83.7%3839
70 t/s8,800 pp20 s5.2%72.0%78.8%77.2%3759
35 t/s4,200 pp42 s19.5%42.9%35.7%52.0%80.0%84.3%85.2%3697
GPT-OSS 120B120 B · 5 B active · moe🤗
100 t/s3,600 pp55 s18.5%18.7%16.2%62.4%87.8%80.9%90.0%3573
45 t/s4,200 pp42 s45.3%66.0%3361
Gemma 3 27B27 B · dense🤗
40 t/s4,200 pp42 s42.4%67.5%3321
Llama 4 Scout 109B-A17B (MoE)109 B · 17 B active · moe🤗
30 t/s3,600 pp55 s32.8%57.2%74.3%3315
16 t/s1,900 pp1.8 min32.6%72.2%3174
Gemma 4 26B-A4B (MoE)26 B · 4 B active · moe🤗
120 t/s4,200 pp42 s8.7%34.2%13.8%17.4%77.1%82.3%82.6%3060
Qwen 3 Coder 30B-A3B (MoE)30 B · 3 B active · moe🤗
120 t/s4,200 pp42 s50.3%3042
Llama 3.3 70B70 B · dense🤗
28 t/s1,900 pp1.8 min28.8%50.5%68.9%2990
Llama 3.1 8B8 B · dense🤗
100 t/s15,000 pp12 s34.6%49.0%2527
Qwen 3 8B8 B · dense🤗
100 t/s15,000 pp12 s2.8%47.0%65.5%2325
Gemini 3.1 ProGoogle DeepMind · closed125 t/s2.1 min44.7%80.2%54.2%80.6%91.7%94.3%91.0%
ChatGPT 5.5OpenAI · closed61 t/s1.6 min52.2%82.0%58.6%88.7%88.0%93.6%
Claude Sonnet 5Anthropic · closed57.4%80.4%63.2%
Claude Opus 4.8Anthropic · closed59 t/s2.9 min57.9%69.2%88.6%93.6%
Open in the live picker (Q2 / Q4 / Q5 / Q8 toggles) → Compare Quad RTX 3090 (used) build with another build → Try other hardware → Submit a benchmark for Quad RTX 3090 (used) build ↗

Last updated 2026-07-11