Pixtral 12B needs ~12.3 GB VRAM. RX 6900 XT 16GB has 16.0 GB. With Q4_K_M quantization, expect ~43 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
42.9 tok/s
TTFT
4517 ms
Safe context
41K
Memory
12.3 GB / 16.0 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 | A | Runs well | 42.9 tok/s | 2464 ms | 41K |
| Coding | A | Runs well | 42.9 tok/s | 4517 ms | 41K |
| Agentic Coding | A | Tight fit | 42.9 tok/s | 6570 ms | 41K |
| Reasoning | A | Runs well | 42.9 tok/s | 5338 ms | 41K |
| RAG | A | Tight fit | 42.9 tok/s | 8213 ms | 41K |
How Pixtral 12B (12B params) fits at each quantization level on RX 6900 XT 16GB (16.0 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 4.7 GB | Low | A72 |
Q3_K_S | 3 | 5.9 GB | Low | A73 |
NVFP4 | 4 |
Copy-paste commands to run Pixtral 12B on your machine.
Run
ollama run pixtralYour hardware
| Model | Params | Grade | Decode | Capabilities |
|---|---|---|---|---|
| 14B | S | 36.9 tok/s | ||
| 14.7B | S | 35 tok/s |
Yes, RX 6900 XT 16GB can run Pixtral 12B with a A grade (Runs well). Expected decode speed: 42.9 tok/s.
Pixtral 12B (12B parameters) requires approximately 12.3 GB of memory with Q4_K_M quantization.
The recommended quantization for Pixtral 12B is Q4_K_M, which balances quality and memory efficiency.
On RX 6900 XT 16GB, Pixtral 12B achieves approximately 42.9 tokens per second decode speed with a time-to-first-token of 4517ms using Q4_K_M quantization.
For coding workloads, Pixtral 12B on RX 6900 XT 16GB receives a A grade with 42.9 tok/s and 41K context.
On RX 6900 XT 16GB, Pixtral 12B can safely use up to 41K tokens of context. The model's official context limit is 131K, 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/pixtral-12b-on-rx-6900-xt-16gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>
Preview:
6.7 GB |
| Medium |
| A74 |
Q4_K_M | 4 | 7.3 GB | Medium | A75 |
Q5_K_M | 5 | 8.6 GB | High | A75 |
Q6_KBest for your GPU | 6 | 9.8 GB | High | A75 |
Q8_0 | 8 | 12.8 GB | Very High | F0 |
F16 | 16 | 24.6 GB | Maximum | F0 |
| 21B | A | 33.8 tok/s |
| 14B | S | 36.7 tok/s |
| 22B | A | 12.3 tok/s |