Can I Run Phi 3.5 Family on RTX 3060 12 GB Desktop (12 GB VRAM, 32 GB RAM)?
Written by Jakub Rusinowski · Last updated August 20, 2024
Yes — comfortably
Yes, comfortably — Phi 3.5 Mini at Q8_0 needs about 5.6 GB of the 12 GB usable on RTX 3060 12 GB Desktop (12 GB VRAM, 32 GB RAM), leaving ~6.4 GB spare and running at ~53.5 tok/s (estimated), with room for about 65,536 tokens of context.
Confidence: high · Recommended quantization: Q8_0 · Estimated speed: ~53.5 tok/s
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RTX 3060 12 GB Desktop (12 GB VRAM, 32 GB RAM) — what it gives a model
| Usable memory for models | 12 GB |
| Memory bandwidth | 360 GB/s |
| Form factor | Desktop |
| Operating system | Windows or Linux |
| Memory upgradeable | Yes |
Phi 3.5 Family on RTX 3060 12 GB Desktop (12 GB VRAM, 32 GB RAM): memory by quantization
| Quant | Memory needed | Fits 12 GB? | Max context | Est. speed | Download |
|---|---|---|---|---|---|
| F16 | 9.2 GB | ✓ Yes | 32K | ~31.4 tok/s | 7.6 GB |
| Q8_0 | 5.6 GB | ✓ Yes | 64K | ~53.5 tok/s | 4 GB |
| Q6_K | 4.7 GB | ✓ Yes | 64K | ~65.5 tok/s | 3.1 GB |
| Q5_K_M | 4.3 GB | ✓ Yes | 64K | ~72.9 tok/s | 2.7 GB |
| Q4_K_M | 3.9 GB | ✓ Yes | 64K | ~81.7 tok/s | 2.3 GB |
| Q3_K_M | 3.2 GB | ✓ Yes | 64K | ~102.7 tok/s | 1.6 GB |
| Q2_K | 2.9 GB | ✓ Yes | 64K | ~119.6 tok/s | 1.2 GB |
RTX 3060 12 GB desktop limitations
- The budget entry point to local AI: 12 GB runs 7–14B models well and nothing larger without offload.
Recommended setup
Ollama or llama.cpp (CUDA/ROCm) — vLLM if you need concurrent serving
How these numbers are calculated
- Memory need = quantized weights + KV cache at 8,192 tokens (f16) + 0.8 GB runtime overhead.
- 12 GB of VRAM on the NVIDIA GeForce RTX 3060 (12GB) at 360 GB/s.
- 32 GB of system RAM available for CPU offload when a model exceeds VRAM.
- Throughput is a memory-bandwidth roofline estimate, not a measurement. It is labelled "estimated" everywhere it appears.
- KV cache is computed from this model's published attention configuration.
FAQ
Can I run Phi 3.5 Family on RTX 3060 12 GB Desktop (12 GB VRAM, 32 GB RAM)?
Yes, comfortably — Phi 3.5 Mini at Q8_0 needs about 5.6 GB of the 12 GB usable on RTX 3060 12 GB Desktop (12 GB VRAM, 32 GB RAM), leaving ~6.4 GB spare and running at ~53.5 tok/s (estimated), with room for about 65,536 tokens of context.
Which quantization of Phi 3.5 Family should I use on RTX 3060 12 GB Desktop (12 GB VRAM, 32 GB RAM)?
Q8_0 — it needs about 5.6 GB of the 12 GB available, downloads as roughly 4 GB, and runs at an estimated 53.5 tokens/sec with up to 64K of context.
What limits Phi 3.5 Family on RTX 3060 12 GB Desktop (12 GB VRAM, 32 GB RAM)?
Nothing binding — the model fits with headroom and generates at a usable speed on this hardware.
Which runtime should I use?
Ollama or llama.cpp (CUDA/ROCm) — vLLM if you need concurrent serving
Other Computers
Other Models on RTX 3060 12 GB Desktop (12 GB VRAM, 32 GB RAM)
- Phi-4 Family on RTX 3060 12 GB Desktop (12 GB VRAM, 32 GB RAM)
- Phi-4 Mini on RTX 3060 12 GB Desktop (12 GB VRAM, 32 GB RAM)
- Qwen 2.5 Family on RTX 3060 12 GB Desktop (12 GB VRAM, 32 GB RAM)
- Qwen 2.5 VL on RTX 3060 12 GB Desktop (12 GB VRAM, 32 GB RAM)
- Qwen 3 on RTX 3060 12 GB Desktop (12 GB VRAM, 32 GB RAM)
Phi 3.5 Family on GPUs
- Phi 3.5 Family on NVIDIA GeForce RTX 5060 Ti 8GB
- Phi 3.5 Family on NVIDIA GeForce RTX 5060
- Phi 3.5 Family on NVIDIA GeForce RTX 4060
What This Model Is Good At
Model & Tools
← Can I Run It? | Phi 3.5 Family model page | Check your hardware