RTX 4000 Ada 20GB经济之选20 GB VRAM (+4)360 GB/s (+40)
B
Raises estimated decode speed by about 35%.35.3 tok/s 解码
Raises estimated decode speed by about 35%.
Adds memory headroom for longer context windows and future model growth.
~$1,250 MSRP
Can Phi 3 Medium 14B run on NVIDIA T4 16GB?
YES — Tight Fit
B61Good
Estimated from fit model
Phi 3 Medium 14B needs ~14.4 GB VRAM. NVIDIA T4 16GB has 16.0 GB. With Q4_K_M quantization, expect ~24 tok/s.
Runtime: OllamaCapacity: TightBandwidth: LowStack: BasicBottleneck: Balanced
Operating mode
Choose the run profile you care about
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
Q4_K_M (Medium quality) — 14.4 GB, 26.2 tok/s, Tight fit
14.4 GB required16.0 GB available
90% VRAM used
Fit status
Tight fit
Decode
26.2 tok/s
TTFT
7394 ms
Safe context
24K
Memory
14.4 GB / 16.0 GB
Memory breakdown
Weights8.5 GB
KV Cache3.1 GB
Runtime1.2 GB
Headroom1.6 GB
See how fast it feels
See how fast it feelsPhi 3 Medium 14B on NVIDIA T4 16GB
1st promptCold start — includes initialization
>Solve: If a train travels at 60 mph for 2.5 hours, how far does it go?
Let me work through this step by step.
Given information:
- Speed = 60 mph (miles per hour)
- Time = 2.5 hours
Formula: Distance = Speed x Time
Calculation:
Distance = 60 mph x 2.5 h
= 150 miles
The train travels 150 miles.
Double-check: at 60 mph the train covers 60 miles each hour. In half an hour it covers 30 miles. So in 2.5 hours: 60 + 60 + 30 = 150 miles. Confirmed.
2nd promptWarm — model ready, no init overhead
>What if the train stops for 20 minutes halfway?
The stop doesn't change the total distance covered while moving, but it affects total trip time.
Breakdown:
- First half: 1.25 hours at 60 mph = 75 miles
- Stop: 20 minutes (no distance)
- Second half: 1.25 hours at 60 mph = 75 miles
Total distance: 150 miles (same)
Total time: 2.5 h + 0.33 h = 2.83 hours
Average speed: 150 / 2.83 = 53 mph
The distance stays the same but average speed drops to 53 mph because of the stop.
Estimated: 26.2 tok/s decode · 7.4s TTFT (warm) · 66 tok/s prefill
What limits this setup
This setup is broadly balanced for this model.
Older PCIe generation
PCIe 3.0 is workable, but it compounds the penalty when you offload heavily or try to scale across multiple cards.
Best improvement path
Performance by workload
| Workload | Grade | Fit | Decode | TTFT | Context |
|---|---|---|---|---|---|
| Chat | B | Runs well | 26.2 tok/s | 4033 ms | 24K |
| Coding | B | Tight fit | 24.4 tok/s | 7949 ms | 24K |
| Agentic Coding | C | Very compromised (needs ~0.7 GB host RAM) | 15.8 tok/s | 17825 ms | 24K |
| Reasoning | B | Tight fit | 26.2 tok/s | 8739 ms | 24K |
| RAG | C | Very compromised (needs ~0.7 GB host RAM) | 15.8 tok/s | 22281 ms | 24K |
Quantization options
How Phi 3 Medium 14B (14B params) fits at each quantization level on NVIDIA T4 16GB (16.0 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 5.5 GB | Low | B60 |
Q3_K_S | 3 | 6.9 GB | Low | B62 |
NVFP4 | 4 | 7.8 GB | Medium | B63 |
Q4_K_M | 4 | 8.5 GB | Medium | B62 |
Q5_K_M | 5 | 10.1 GB | High | B62 |
Q6_KBest for your GPU | 6 | 11.5 GB | High | B62 |
Q8_0 | 8 | 15.0 GB | Very High | F0 |
F16 | 16 | 28.7 GB | Maximum | F0 |
Get started
Copy-paste commands to run Phi 3 Medium 14B on your machine.
Run
ollama run phi3:medium升级选项
能流畅运行 Phi 3 Medium 14B 的硬件
RTX 4000 Ada 20GB经济之选RTX 3090 24GB最佳性价比24 GB VRAM (+8)936 GB/s (+616)
B
Raises estimated decode speed by about 215%.82.5 tok/s 解码
Raises estimated decode speed by about 215%.
Adds memory headroom for longer context windows and future model growth.
~$1,499 MSRP
RTX PRO 4000 Blackwell 24GBNVIDIA 升级24 GB VRAM (+8)672 GB/s (+352)
B
Raises estimated decode speed by about 171%.71.1 tok/s 解码
Raises estimated decode speed by about 171%.
Adds memory headroom for longer context windows and future model growth.
~$1,599 MSRP
Frequently asked questions
Can NVIDIA T4 16GB run Phi 3 Medium 14B?
Yes, NVIDIA T4 16GB can run Phi 3 Medium 14B with a B grade (Tight fit). Expected decode speed: 24.4 tok/s.
How much VRAM does Phi 3 Medium 14B need?
Phi 3 Medium 14B (14B parameters) requires approximately 14.4 GB of memory with Q4_K_M quantization.
What is the best quantization for Phi 3 Medium 14B?
The recommended quantization for Phi 3 Medium 14B is Q4_K_M, which balances quality and memory efficiency.
What speed will Phi 3 Medium 14B run at on NVIDIA T4 16GB?
On NVIDIA T4 16GB, Phi 3 Medium 14B achieves approximately 24.4 tokens per second decode speed with a time-to-first-token of 7949ms using Q4_K_M quantization.
Can NVIDIA T4 16GB run Phi 3 Medium 14B for coding?
For coding workloads, Phi 3 Medium 14B on NVIDIA T4 16GB receives a B grade with 24.4 tok/s and 24K context.
What context window can Phi 3 Medium 14B use on NVIDIA T4 16GB?
On NVIDIA T4 16GB, Phi 3 Medium 14B can safely use up to 24K tokens of context. The model's official context limit is 128K, but available memory constrains the safe maximum.
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