Phi-4 14B needs ~15.2 GB VRAM. RTX 4090 24GB has 24.0 GB. With Q4_K_M quantization, expect ~96 tok/s.
Operating mode
Interactive favors responsiveness, while light API and scale-out lean harder on serving readiness. The fit stays the same, but the recommendation lens changes.
Current mode
Balanced
Balanced for general local use. Keeps the ranking neutral across personal and serving workflows.
Select quantization to explore
Fit status
Runs well
Decode
96.4 tok/s
TTFT
2008 ms
Safe context
16K
Memory
15.2 GB / 24.0 GB
This setup is broadly balanced for this model.
No major red flags
This recommendation has enough memory headroom and acceptable estimated speed for the selected workload.
| Workload | Grade | Fit | Decode | TTFT | Context |
|---|---|---|---|---|---|
| Chat | S | Runs well | 96.4 tok/s | 1095 ms | 16K |
| Coding | S | Runs well | 96.4 tok/s | 2008 ms | 16K |
| Agentic Coding | S | Runs well | 96.4 tok/s | 2920 ms | 16K |
| Reasoning | S | Runs well | 96.4 tok/s | 2373 ms | 16K |
| RAG | S | Runs well | 96.4 tok/s | 3650 ms | 16K |
How Phi-4 14B (14B params) fits at each quantization level on RTX 4090 24GB (24.0 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 5.5 GB | Low | A77 |
Q3_K_S | 3 | 6.9 GB | Low | A78 |
NVFP4 | 4 | 7.8 GB | Medium | A79 |
Q4_K_M | 4 | 8.5 GB | Medium | A79 |
Q5_K_M | 5 | 10.1 GB | High | A80 |
Q6_K | 6 | 11.5 GB | High | A81 |
Q8_0Best for your GPU | 8 | 15.0 GB | Very High | A82 |
F16 | 16 | 28.7 GB | Maximum | F0 |
Copy-paste commands to run Phi-4 14B on your machine.
Run
ollama run phi4Your hardware
| Model | Params | Grade | Decode | Capabilities |
|---|---|---|---|---|
 Qwen3-Coder 30B A3B Instruct | 30.5B | S | 115.8 tok/s | |
| Qwen 3.5 27B | 27B | S | 50.2 tok/s | |
| Qwen 3.6 27B | 27B | S | 50.4 tok/s | |
| Qwen3-VL 30B A3B Instruct | 30B | S | 119.8 tok/s | |
| Qwen 3.5 35B A3B | 35B | A | 69.4 tok/s |
Yes, RTX 4090 24GB can run Phi-4 14B with a S grade (Runs well). Expected decode speed: 96.4 tok/s.
Phi-4 14B (14B parameters) requires approximately 15.2 GB of memory with Q4_K_M quantization.
The recommended quantization for Phi-4 14B is Q4_K_M, which balances quality and memory efficiency.
On RTX 4090 24GB, Phi-4 14B achieves approximately 96.4 tokens per second decode speed with a time-to-first-token of 2008ms using Q4_K_M quantization.
For coding workloads, Phi-4 14B on RTX 4090 24GB receives a S grade with 96.4 tok/s and 16K context.
On RTX 4090 24GB, Phi-4 14B can safely use up to 16K tokens of context. The model's official context limit is 16K, but available memory constrains the safe maximum.
Paste this snippet into any page to show a live fit card.
<iframe src="https://willitrunai.com/embed/phi-4-14b-on-rtx-4090-24gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>
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