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URL: https://willitrunai.com/can-run/phi-4-reasoning-plus-14b-on-rtx-4000-ada-20gb

⇱ Phi-4-reasoning-plus 14B on RTX 4000 Ada 20GB? YES

Can Phi-4-reasoning-plus 14B run on RTX 4000 Ada 20GB?

YES — Runs Great

S93Excellent
○Estimated from fit model

Phi-4-reasoning-plus 14B needs ~15.2 GB VRAM. RTX 4000 Ada 20GB has 20.0 GB. With Q4_K_M quantization, expect ~34 tok/s.

Runtime: OllamaCapacity: RoomyBandwidth: LowStack: BasicBottleneck: Balanced
Share:

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.

Capabilities:

Select quantization to explore

Q4_K_M (Medium quality) — 15.2 GB, 33.7 tok/s, Runs well
15.2 GB required20.0 GB available
76% VRAM used

Fit status

Runs well

Decode

33.7 tok/s

TTFT

5751 ms

Safe context

33K

Memory

15.2 GB / 20.0 GB

Memory breakdown

Weights9.0 GB
KV Cache3.1 GB
Runtime1.2 GB
Headroom2.0 GB

See how fast it feels

See how fast it feelsPhi-4-reasoning-plus 14B on RTX 4000 Ada 20GB
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: 33.7 tok/s decode · 5.8s TTFT (warm) · 84 tok/s prefill

What limits this setup

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.

Best improvement path

Performance by workload

WorkloadGradeFitDecodeTTFTContext
ChatSRuns well33.7 tok/s3137 ms33K
CodingSRuns well33.7 tok/s5751 ms33K
Agentic CodingSTight fit33.7 tok/s8365 ms33K
ReasoningSRuns well33.7 tok/s6797 ms33K
RAGSTight fit33.7 tok/s10456 ms33K

Quantization options

How Phi-4-reasoning-plus 14B (14.699999809265137B params) fits at each quantization level on RTX 4000 Ada 20GB (20.0 GB usable).

QuantBitsVRAMQualityFit
Q2_K
2
5.7 GB
LowS87
Q3_K_S
3
7.2 GB
LowS88
NVFP4
4
8.2 GB
MediumS89
Q4_K_M
4
9.0 GB
MediumS90
Q5_K_M
5
10.6 GB
HighS91
Q6_K
6
12.1 GB
HighS90
Q8_0Best for your GPU
8
15.7 GB
Very HighS90
F16
16
30.1 GB
MaximumF0

Get started

Copy-paste commands to run Phi-4-reasoning-plus 14B on your machine.

Run

ollama run phi4-reasoning

Your hardware

More models your RTX 4000 Ada 20GB can run

ModelParamsGradeDecodeCapabilities
👁 Alibaba
Qwen3-Coder 30B A3B Instruct		30.5BA23.2 tok/s
👁 Alibaba
Qwen 3.5 27B		27BA10.4 tok/s
👁 Alibaba
Qwen 3.6 27B		27BS13 tok/s
👁 Alibaba
Qwen3-VL 30B A3B Instruct		30BA24.6 tok/s
👁 Mistral
Magistral Small 2507		24BS15 tok/s

Frequently asked questions

See all results for RTX 4000 Ada 20GBSee all hardware for Phi-4-reasoning-plus 14B