Phi-3 14B Q5 VRAM Requirement and Ollama Model Size
Phi-3 14B Q5 needs 12GB minimum VRAM, 22GB optimal VRAM, and 32GB+ system RAM for a safer Ollama run. Popular Ollama model family: Phi-3. Caveat: Estimated values are placeholders unless marked measured..
Hardware Snapshot
| Family | Phi-3 |
|---|---|
| Scenario | reasoning |
| License scope | open-source |
| Quantization | Q5 |
| VRAM minimum | 12GB |
| VRAM optimal | 22GB |
| Best local GPU | RTX 3090 24GB |
| Cloud fallback | A6000 48GB |
| Updated | 2026-02-24 |
| Data status | Estimated baseline (pending measurement) |
| Ollama source | Library reference (verified: 2026-02-24) |
| Ollama tag | phi3:14b |
| Category | reasoning |
Benchmark Anchors
| Hardware | Expected tok/s |
|---|---|
| RTX 3090 24GB | 18.9 |
| RTX 4090 24GB | 25.5 |
| A100 80GB | 45.4 |
Quick Answers
- How much VRAM does Phi-3 14B Q5 need?
- Phi-3 14B Q5 needs about 12GB minimum VRAM and 22GB optimal VRAM for a safer local run target.
- Can Phi-3 14B Q5 run on an RTX 3090 24GB?
- Yes. Phi-3 14B Q5 fits comfortably on an RTX 3090 24GB target with 22GB optimal VRAM.
- What is the Ollama command for Phi-3 14B Q5?
- Use ollama run phi3:14b. Check the Ollama tag phi3:14b before running.
- What is the approximate Ollama model size for Phi-3 14B Q5?
- Phi-3 14B Q5 uses the phi3:14b Ollama tag. Treat the Q5 14 profile as smaller than the runtime VRAM budget; use 12GB minimum VRAM and 22GB optimal VRAM as the safer sizing numbers.
- How much system RAM does Phi-3 14B Q5 need in Ollama?
- Plan for at least 32GB system RAM alongside 12GB minimum VRAM and 22GB optimal VRAM. More RAM helps if layers spill to CPU or if you run multiple models.
- What is the RAM vs VRAM requirement for Phi-3 14B Q5?
- Phi-3 14B Q5 should be sized by GPU VRAM first: 12GB minimum and 22GB optimal. System RAM should be at least 32GB so Ollama has room for CPU-side layers, context, and the surrounding app process.
- What is Phi-3 14B Q5 VRAM usage on an RTX 3090?
- Phi-3 14B Q5 is comfortable for an RTX 3090 24GB target. The page estimates 12GB minimum and 22GB optimal VRAM, with spill risk marked as moderate at long context.
- Which LocalVRAM profiles share the phi3:14b Ollama tag?
- LocalVRAM tracks these profiles for the same Ollama tag or model family: Phi-3 14B Q5 (Q5, 12GB min/22GB optimal); Phi-3 14B Q4 (Q4, 10GB min/20GB optimal); Phi-3 14B Q8 (Q8, 16GB min/26GB optimal); Phi-3 14B FP16 (FP16, 22GB min/34GB optimal). Use the table on this page to compare quantization and VRAM targets before choosing a run command.
- Is Phi-3 14B Q5 benchmark data measured or estimated?
- Phi-3 14B Q5 currently uses estimated baseline anchors on this page. Verified benchmark data will replace the estimate after a local hardware run is available.
Ollama Model Size and RAM Notes
| Ollama tag | phi3:14b |
|---|---|
| Run command | ollama run phi3:14b |
| Model size guidance | Q5 quantization, 14 profile; size runtime by VRAM, not download size alone |
| Runtime VRAM target | 12GB minimum, 22GB optimal |
| System RAM planning | 32GB or more when running this tag locally with Ollama |
Download size alone is not a safe runtime budget. Runtime memory also includes KV cache, context length, and GPU layer placement.
Ollama RAM vs VRAM Requirements
| GPU VRAM usage estimate | 12GB minimum / 22GB optimal |
|---|---|
| System RAM requirement | 32GB or more for Ollama runtime headroom |
| RTX 3090 24GB fit | Comfortable |
| CPU spill risk | Moderate at long context |
| Context warning | Longer context increases KV cache memory, so real VRAM usage can exceed short-prompt estimates. |
For Ollama, VRAM is the first fit check. System RAM matters when layers spill to CPU, when context grows, or when the local app stack runs beside the model.
Available Tag Variants and VRAM Targets
| Profile | Quantization | VRAM target | Ollama tag |
|---|---|---|---|
| Phi-3 14B Q5 | Q5 | 12GB min / 22GB optimal | phi3:14b |
| Phi-3 14B Q4 | Q4 | 10GB min / 20GB optimal | phi3:14b |
| Phi-3 14B Q8 | Q8 | 16GB min / 26GB optimal | phi3:14b |
| Phi-3 14B FP16 | FP16 | 22GB min / 34GB optimal | phi3:14b |
Ollama library tags often group multiple quantization choices under one model family. LocalVRAM separates them into VRAM profiles so you can pick the right local target.
Real Hardware Benchmark (RTX 3090)
Real benchmark data not available yet for this tag. Estimated anchors are shown above.
Performance Curve
Reference anchors are baseline estimates. Measured RTX 3090 data is overlaid when available.
Best Hardware for Phi-3 14B Q5
- Local run: RTX 3090 (24GB) (Check latest deal) for around 18.9 tok/s on this profile.
- Cloud run: RunPod A6000 48GB , about 2.4x the local 3090 speed anchor.
- Alternative cloud: Vast.ai options for flexible spot pricing.
Local vs Cloud Cost Hint
| Mode | 40h / month | 120h / month |
|---|---|---|
| Local power only (3090 baseline) | $2.24 | $6.72 |
| A6000 48GB | $30.4 | $91.2 |
Related Model Profiles
- Phi-3 14B Q4 10GB min, 20GB optimal
- Phi-3 14B Q8 16GB min, 26GB optimal
- Phi-3 14B FP16 22GB min, 34GB optimal
ollama run phi3:14b More reasoning models More 14b-class models Benchmark changelog Submit your test result Check local GPU upgrade We may earn a commission if you click links on this page.
This page currently uses estimated benchmark baselines. Measured data will replace it after validation.