Microsoft Phi-4 14B on NVIDIA RTX 4080 Super (16GB VRAM)
Full FP16 (32.5 GB) exceeds 16 GB VRAM, but 4-bit GGUF Q4_K_M / AWQ requires 11.4 GB (9.18 GB weights + 1.56 GB KV cache at 8K context), delivering ~51.2 tokens/sec.
🎛️ Interactive VRAM & KV-Cache Tuner
📊 Real-Time Memory Footprint
11.4 GB / 16 GB🚀 Ready-to-Run Launch Command
ollama run phi4:14b # Or with llama.cpp server (8K context, Flash Attention): llama-server -hf microsoft/phi-4-GGUF -c 8192 -ngl 99 -fa
Need 11.4 GB+ VRAM to run Microsoft Phi-4 14B?
Recommended cloud setup for 4-bit: RTX 4090 (24GB) (or 32.5 GB for full FP16). Spin up a pre-configured vLLM / Ollama instance in 60 seconds:
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|---|---|---|---|---|---|---|
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All Quantization Formats: Microsoft Phi-4 14B on NVIDIA RTX 4080 Super
| Quantization Format | Bits/Weight | Weights VRAM | KV Cache (8K) | Total VRAM | Fits on 1x NVIDIA RTX 4080 Super (16GB)? | Est. Speed | GPUs Needed |
|---|---|---|---|---|---|---|---|
| FP16 / BF16 (Unquantized) | 16 bpw | 30.28 GB | 1.56 GB | 32.5 GB | No (Over by 16.5GB) | ~2 tok/s | 3x NVIDIA RTX 4080 Super |
| FP8 (W8A8 / E4M3) | 8.5 bpw | 16.09 GB | 1.56 GB | 18.31 GB | No (Over by 2.3GB) | ~3.8 tok/s | 2x NVIDIA RTX 4080 Super |
| GGUF Q8_0 (8-bit) | 8.5 bpw | 16.09 GB | 1.56 GB | 18.31 GB | No (Over by 2.3GB) | ~3.8 tok/s | 2x NVIDIA RTX 4080 Super |
| GGUF Q6_K (6-bit) | 6.56 bpw | 12.42 GB | 1.56 GB | 14.64 GB | Tight (92%) | ~37.9 tok/s | 1x NVIDIA RTX 4080 Super |
| GGUF Q5_K_M (5-bit) | 5.69 bpw | 10.77 GB | 1.56 GB | 12.99 GB | Yes (81%) | ~43.6 tok/s | 1x NVIDIA RTX 4080 Super |
| GGUF Q4_K_M / AWQ (4-bit) | 4.85 bpw | 9.18 GB | 1.56 GB | 11.4 GB | Yes (71%) | ~51.2 tok/s | 1x NVIDIA RTX 4080 Super |
| GGUF IQ4_XS (4.25 bpw) | 4.25 bpw | 8.04 GB | 1.56 GB | 10.27 GB | Yes (64%) | ~58.4 tok/s | 1x NVIDIA RTX 4080 Super |
| GGUF Q3_K_M (3-bit) | 3.91 bpw | 7.4 GB | 1.56 GB | 9.62 GB | Yes (60%) | ~63.5 tok/s | 1x NVIDIA RTX 4080 Super |
Frequently Asked Questions (Microsoft Phi-4 14B + NVIDIA RTX 4080 Super)
Can NVIDIA RTX 4080 Super (16GB) run Microsoft Phi-4 14B locally?
Yes — NVIDIA RTX 4080 Super (16GB) can run Microsoft Phi-4 14B using GGUF Q6_K (6-bit). Full FP16 (32.5 GB) exceeds 16 GB VRAM, but 4-bit GGUF Q4_K_M / AWQ requires 11.4 GB (9.18 GB weights + 1.56 GB KV cache at 8K context), delivering ~51.2 tokens/sec.
How is KV Cache calculated for Microsoft Phi-4 14B?
Microsoft Phi-4 14B uses Dense-GQA with 40 transformer layers, 40 attention heads, and 10 KV heads (head dimension 128). At 8,192 tokens in FP16, KV cache consumes 1.56 GB. Enabling 8-bit KV cache (-ctk q8_0 -ctv q8_0 in llama.cpp or --kv-cache-dtype fp8 in vLLM) cuts this in half to 0.78 GB.