Can Ministral 3 14B run on RX 6900 XT 16GB?

YES — Tight Fit

S86Excellent

Estimated from fit model

Ministral 3 14B needs ~14.4 GB VRAM. RX 6900 XT 16GB has 16.0 GB. With Q4_K_M quantization, expect ~34 tok/s.

Runtime: TransformersCapacity: TightBandwidth: MediumStack: StandardBottleneck: 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.

Capabilities:

Select quantization to explore

Q4_K_M (Medium quality) — 14.4 GB, 36.7 tok/s, Tight fit

14.4 GB required16.0 GB available

90% VRAM used

Fit status

Tight fit

Decode

36.7 tok/s

TTFT

5270 ms

Safe context

27K

Memory

14.4 GB / 16.0 GB

Memory breakdown

Weights8.5 GB

KV Cache2.4 GB

Runtime1.8 GB

Headroom1.6 GB

See how fast it feels

See how fast it feelsMinistral 3 14B on RX 6900 XT 16GB
1st promptCold start — includes initialization
>What is local AI inference?
Local AI inference means running an AI language model directly on your own hardware — your laptop, desktop, or server — instead of sending requests to a remote cloud API.

When you run inference locally the model weights are loaded into your GPU or unified memory. Each token you generate requires reading those weights from memory, so memory bandwidth is the main bottleneck for decode speed.

Key benefits of running locally:
  - Full privacy: your prompts never leave your machine
  - No per-token cost or rate limits
  - Works offline once the model is downloaded
  - Latency depends only on your hardware
2nd promptWarm — model ready, no init overhead
>How much VRAM do I need?
It depends on the model size and quantization level. A rough rule of thumb:

  Model size     Q4 (4-bit)    Q8 (8-bit)    FP16
  7B params      ~4.3 GB       ~7.5 GB       ~14 GB
  13B params     ~7.9 GB       ~13.9 GB      ~26 GB
  70B params     ~42.7 GB      ~74.9 GB      ~140 GB

Most people use 4-bit quantization (Q4_K_M) which gives 90-95% of full quality at a fraction of the memory. A 24 GB GPU can comfortably run most 7B-13B models.
Estimated: 36.7 tok/s decode · 5.3s TTFT (warm) · 92 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

Workload	Grade	Fit	Decode	TTFT	Context
Chat	S	Tight fit	36.7 tok/s	2875 ms	27K
Coding	S	Tight fit	34.2 tok/s	5665 ms	27K
Agentic Coding	A	Runs with offload (needs ~0.4 GB host RAM)	24.8 tok/s	11358 ms	27K
Reasoning	S	Tight fit	36.7 tok/s	6228 ms	27K
RAG	A	Runs with offload (needs ~0.4 GB host RAM)	24.8 tok/s	14198 ms

Quantization options

How Ministral 3 14B (14B params) fits at each quantization level on RX 6900 XT 16GB (16.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	5.5 GB	Low	A84
Q3_K_S	3	6.9 GB	Low	S86
NVFP4	4

Get started

Copy-paste commands to run Ministral 3 14B on your machine.

Run

docker run --rm -it ghcr.io/ggerganov/llama.cpp:full \
  --hf-repo "mistralai/Ministral-3-14B-Instruct-2512" \
  --hf-file "Ministral-3-14B-Instruct-2512-Q4_K_M.gguf" \
  -c 4096 -ngl 99

Your hardware

More models your RX 6900 XT 16GB can run

Model	Params	Grade	Decode	Capabilities
Phi-4-reasoning-plus 14B	14.7B	S	35 tok/s
GPT-OSS 20B	21B	A	30.4 tok/s

Frequently asked questions

Can RX 6900 XT 16GB run Ministral 3 14B?

Yes, RX 6900 XT 16GB can run Ministral 3 14B with a S grade (Tight fit). Expected decode speed: 34.2 tok/s.

How much VRAM does Ministral 3 14B need?

Ministral 3 14B (14B parameters) requires approximately 14.4 GB of memory with Q4_K_M quantization.

What is the best quantization for Ministral 3 14B?

The recommended quantization for Ministral 3 14B is Q4_K_M, which balances quality and memory efficiency.

What speed will Ministral 3 14B run at on RX 6900 XT 16GB?

On RX 6900 XT 16GB, Ministral 3 14B achieves approximately 34.2 tokens per second decode speed with a time-to-first-token of 5665ms using Q4_K_M quantization.

Can RX 6900 XT 16GB run Ministral 3 14B for coding?

For coding workloads, Ministral 3 14B on RX 6900 XT 16GB receives a S grade with 34.2 tok/s and 27K context.

What context window can Ministral 3 14B use on RX 6900 XT 16GB?

On RX 6900 XT 16GB, Ministral 3 14B can safely use up to 27K tokens of context. The model's official context limit is 262K, but available memory constrains the safe maximum.

See all results for RX 6900 XT 16GB See all hardware for Ministral 3 14B

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