Can I Run Phi-4 Family on NVIDIA GeForce RTX 3070?
Written by Jakub Rusinowski · Last updated July 12, 2026
No — Phi-4 (14B) at Q4_K_M needs 10.9 GB at 8K context (8.5 GB weights + 2.4 GB KV cache/overhead), and the NVIDIA GeForce RTX 3070's 8 GB leaves it ~2.9 GB short. The cheapest card that runs it is the NVIDIA GeForce RTX 2080 Ti (11 GB).
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NVIDIA GeForce RTX 3070 Specs
| VRAM | 8 GB |
| Memory Bandwidth | 448 GB/s |
Phi-4 (14B) on the NVIDIA GeForce RTX 3070: VRAM by quantization
| Quant | VRAM needed | Fits 8 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 30.5 GB | ✗ No | — | — |
| Q8_0 | 17.4 GB | ✗ No | — | Build for this |
| Q6_K | 14 GB | ✗ No | — | — |
| Q5_K_M | 12.4 GB | ✗ No | — | Build for this |
| Q4_K_M | 10.9 GB | ✗ No | — | Build for this |
| Q3_K_M | 8.4 GB | ✗ No | — | — |
| Q2_K | 7.1 GB | ✓ Yes | 8K | — |
Assumes an 8K-token context with an f16 KV cache. A longer window needs more; a quantized KV cache needs less. “Max context” is the largest window that still fits in 8 GB. Figures are estimates from parameter count, quantization and memory bandwidth — the analyzer lets you tune KV-cache quant and context.
Context costs VRAM too. At Q4_K_M on the NVIDIA GeForce RTX 3070: 8K 10.9 GB ✗ · 16K 12.6 GB ✗. Past 8K it no longer fits 8 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
No compatible GPU? Phi-4 (14B) on 16 GB of system RAM, CPU only: runs, but it is tight.
Why It Does Not Fit
Every Phi-4 Family variant requires more VRAM than the NVIDIA GeForce RTX 3070 provides (8 GB).
Nearest GPU That Fits
NVIDIA GeForce RTX 2080 Ti (11 GB VRAM).
Phi-4 Family needs ~11 GB but this GPU has 8 GB. Rent a RTX 4090 (24 GB)-class GPU by the hour instead of buying one:
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FAQ
Is the NVIDIA GeForce RTX 3070 enough to run Phi-4 Family locally?
No — Phi-4 (14B) at Q4_K_M needs 10.9 GB at 8K context (8.5 GB weights + 2.4 GB KV cache/overhead), and the NVIDIA GeForce RTX 3070's 8 GB leaves it ~2.9 GB short. The cheapest card that runs it is the NVIDIA GeForce RTX 2080 Ti (11 GB).
What's the cheapest GPU that runs Phi-4 Family?
The NVIDIA GeForce RTX 2080 Ti (11 GB VRAM) is the cheapest upgrade that fits it.
Phi-4 Family on Other GPUs
- Phi-4 Family on NVIDIA GeForce RTX 5060 Ti 8GB
- Phi-4 Family on NVIDIA GeForce RTX 5060
- Phi-4 Family on NVIDIA GeForce RTX 4060
- Phi-4 Family on NVIDIA GeForce RTX 3070 Ti
- Phi-4 Family on AMD Radeon RX 9060 XT 8GB
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VRAM Tier
Troubleshooting
- CUDA out of memory — why it happens and how to fix it
- Which GGUF quant should I download? (Q4 vs Q5 vs Q8)
Buying Guide
← Can I Run It? | Phi-4 Family Model Page | NVIDIA GeForce RTX 3070 GPU Page | VRAM calculator | Check Your Hardware