RTX 3060 12GB: Best GPU Under $300 for Local LLMs (2026)?
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Quick Answer
Used RTX 3060 12GB at ~$200-250 is the best GPU under $300 for local LLMs — 12 GB VRAM runs all 7B and most 14B models.
- ▸RTX 3060 12 GB runs Llama 3 8B Q4_K_M at ~25 tok/s and Qwen 14B Q4_K_M at ~15 tok/s.
- ▸Its 360 GB/s bandwidth beats the newer RTX 4060 (272 GB/s) on LLM inference speed.
- ▸RX 6700 XT 12 GB is cheaper but requires Linux for ROCm; avoid on Windows.
- ▸Avoid 8 GB GPUs under $300 — the VRAM ceiling blocks 14B models entirely.
Updated: 2026-07
Key Takeaways
- ✓Best pick: used NVIDIA RTX 3060 12 GB at $150-250 (May 2026) — CUDA works instantly with Ollama and llama.cpp
- ✓Cheapest pick: used AMD RX 6700 XT at $130-200 — 12 GB VRAM, but ROCm setup adds 3-5 hours of work
- ✓Both cards run every 7B model and most 13B models at Q4 quantization; neither fits a 70B model
- ✓Buy the RTX 3060 in its 12 GB version — the 6 GB variant only runs 3B models and is not worth it
Best Pick: Used NVIDIA RTX 3060 12 GB
The used NVIDIA RTX 3060 12 GB is the best GPU under $300 for local LLMs because 12 GB of VRAM plus zero-setup CUDA support gives you a working LLM box in minutes. At $150-250 in the May 2026 used market, it runs Mistral Small, Llama 3 8B, and Qwen3 8B at 15-20 tokens per second, and most 13B models at Q4.
The RTX 3060 wins on software. Ollama and llama.cpp detect NVIDIA GPUs via CUDA automatically on Windows and Linux — no driver hunting, no ROCm. The AMD RX 6700 XT ($130-200 used) saves $30-80 and matches the 12 GB capacity, but ROCm setup on Linux typically costs 3-5 hours and is unsupported on Windows for fast inference.
Choose the RX 6700 XT only if budget is the single deciding factor and you are comfortable on Linux. For everyone else, the RTX 3060 12 GB is the safer first GPU. Avoid the 6 GB RTX 3060 variant — it looks identical in listings but only fits 3B models.
RTX 3060 12 GB vs RX 6700 XT for Local LLMs
Both cards carry 12 GB of VRAM, so model capacity is identical — the decision is CUDA versus ROCm. Prices below are a May 2026 US used-market snapshot; the 2026 memory shortage keeps GPU prices volatile, so re-check before buying.
| GPU | VRAM | Price (May 2026) | Setup | Best for |
|---|---|---|---|---|
| RTX 3060 12 GB | 12 GB | $150-250 used | CUDA, instant | Best pick — no setup friction |
| RX 6700 XT | 12 GB | $130-200 used | ROCm, 3-5 hours | Cheapest, accepts AMD setup |
Related Reading
- ▸Best GPU Under $600 for Local LLMs — the next tier up: RTX 4060 Ti 16 GB
- ▸Best Ollama Models for RTX 3060 12 GB — which models to pull once you have the card
- ▸Best GPU Buying Guide for Local LLMs 2026 — the full eight-GPU comparison across all budget tiers
Quick Answers About Sub-$300 GPUs for Local LLMs
Can a $300 GPU run local LLMs well?▾
Why pick the RTX 3060 over the cheaper RX 6700 XT?▾
Should I buy the 6 GB or 12 GB RTX 3060?▾
Can a sub-$300 GPU run a 70B model?▾
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