Can Pixtral 12B run on GTX 1660 Super 6GB?

NO — Won't Fit

F0Won't run

Estimated from fit model

Pixtral 12B needs ~11.6 GB but GTX 1660 Super 6GB only has 6.0 GB. Try a smaller quantization or lighter model.

Runtime: OllamaCapacity: No fitBandwidth: LowStack: BasicBottleneck: Memory capacity

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) — 11.6 GB, exceeds 6.0 GB available

11.6 GB required6.0 GB available

193% VRAM needed

5.6 GB over capacity — needs offload or smaller quantization

Fit status

Too heavy

Decode

4.7 tok/s

TTFT

41294 ms

Safe context

Memory

11.6 GB / 6.0 GB

Offload

50%

Memory breakdown

Weights7.3 GB

KV Cache2.4 GB

Runtime1.2 GB

Headroom0.6 GB

See how fast it feels

With memory offload — actual speed may be lower

See how fast it feelsPixtral 12B on GTX 1660 Super 6GB
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: 4.7 tok/s decode · 41.3s TTFT (warm) · 12 tok/s prefill

What limits this setup

Usable VRAM is the main blocker for this model.

Not enough usable memory

The model needs 11.6 GB, but this setup only exposes 6.0 GB of usable VRAM.

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

Add more VRAM headroom

The first useful upgrade is more dedicated VRAM so you can fit the model without shrinking context or dropping to a much lower quant.

Performance by workload

Workload	Grade	Fit	Decode	TTFT	Context
Chat	F	Too heavy	6.0 tok/s	17629 ms	4K
Coding	F	Too heavy	4.7 tok/s	41294 ms	4K
Agentic Coding	F	Too heavy	4.1 tok/s	69174 ms	4K
Reasoning	F	Too heavy	4.7 tok/s	48802 ms	4K
RAG	F	Too heavy	4.1 tok/s	86467 ms	4K

Inference speed

Pixtral 12B inference speed — tokens per second by GPU & Mac

Estimated decode speed (tokens/sec) for Pixtral 12B at Q4_K_M across popular GPUs and Apple Silicon, using the fastest local runtime per device. Fastest is RTX 5090 32GB at ~168 tok/s. Speed is memory-bandwidth bound, so cards that fit the whole model in VRAM run far faster than ones that offload to system RAM.

GPU / Mac	Memory	Quant	Speed (tok/s)	Fits?
RTX 5090 32GB	32 GB	Q4_K_M	168.0	Fits
RTX 4090 24GB	24 GB	Q4_K_M	112.5	Fits
RX 7900 XTX 24GB	24 GB	Q4_K_M	101.5	Fits
RTX 3090 24GB	24 GB	Q4_K_M	96.2	Fits
RTX 4080 Super 16GB	16 GB	Q4_K_M	94.2	Fits
Mac Studio M3 Ultra 256GB	256 GB	Q4_K_M	81.8	Fits
Mac Studio M2 Ultra 128GB	128 GB	Q4_K_M	68.1	Fits
Mac Studio M1 Ultra 128GB	128 GB	Q4_K_M	64.6	Fits
RTX 4070 12GB	12 GB	Q4_K_M	58.3	Offloads
MacBook Pro M4 Max 128GB	128 GB	Q4_K_M	44.5	Fits
MacBook Pro M4 Max 64GB	64 GB	Q4_K_M	44.5	Fits
MacBook Pro M3 Max 64GB	64 GB	Q4_K_M	35.2	Fits
RTX 3060 12GB	12 GB	Q4_K_M	34.2	Offloads
MacBook Pro M1 Max 64GB	64 GB	Q4_K_M	32.3	Fits
MacBook Pro M4 Pro 48GB	48 GB	Q4_K_M	27.2	Fits
RTX 4060 8GB	8 GB	Q4_K_M	9.7	Too big

Estimates for single-stream decoding at Q4_K_M; real tokens/sec varies with prompt length, context, batch size, and runtime build. Prompt processing (prefill) is faster than the decode figures shown here.

Quantization options

How Pixtral 12B (12B params) fits at each quantization level on GTX 1660 Super 6GB (6.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	4.7 GB	Low	F0
Q3_K_S	3	5.9 GB	Low	F0
NVFP4	4	6.7 GB	Medium	F0
Q4_K_M	4	7.3 GB	Medium	F0
Q5_K_M	5	8.6 GB	High	F0
Q6_K	6	9.8 GB	High	F0
Q8_0	8	12.8 GB	Very High	F0
F16	16	24.6 GB	Maximum	F0

Opciones de mejora

Hardware que ejecuta bien Pixtral 12B

RTX 3060 12GBOpción económica

12 GB VRAM (+6)360 GB/s (+24)

Hace que el modelo quepa en el acelerador en lugar de seguir fuera de alcance.25.4 tok/s decodificación

Hace que el modelo quepa en el acelerador en lugar de seguir fuera de alcance.

Elimina el offload a memoria del sistema, que suele ser la mayor mejora individual en latencia y throughput.

~$329 MSRP

RTX 5060 Ti 16GBMejor relación calidad-precio

16 GB VRAM (+10)448 GB/s (+112)

Hace que el modelo quepa en el acelerador en lugar de seguir fuera de alcance.40.8 tok/s decodificación

Hace que el modelo quepa en el acelerador en lugar de seguir fuera de alcance.

Elimina el offload a memoria del sistema, que suele ser la mayor mejora individual en latencia y throughput.

~$449 MSRP

RTX 4060 Ti 16GBMejora NVIDIA

16 GB VRAM (+10)

Hace que el modelo quepa en el acelerador en lugar de seguir fuera de alcance.30.9 tok/s decodificación

Hace que el modelo quepa en el acelerador en lugar de seguir fuera de alcance.

Elimina el offload a memoria del sistema, que suele ser la mayor mejora individual en latencia y throughput.

~$499 MSRP

Frequently asked questions

Can GTX 1660 Super 6GB run Pixtral 12B?

No, Pixtral 12B requires more memory than GTX 1660 Super 6GB provides.

How much VRAM does Pixtral 12B need?

Pixtral 12B (12B parameters) requires approximately 11.6 GB of memory with Q4_K_M quantization.

What is the best quantization for Pixtral 12B?

The recommended quantization for Pixtral 12B is Q4_K_M, which balances quality and memory efficiency.

What speed will Pixtral 12B run at on GTX 1660 Super 6GB?

On GTX 1660 Super 6GB, Pixtral 12B achieves approximately 4.7 tokens per second decode speed with a time-to-first-token of 41294ms using Q4_K_M quantization.

Can GTX 1660 Super 6GB run Pixtral 12B for coding?

For coding workloads, Pixtral 12B on GTX 1660 Super 6GB receives a F grade with 4.7 tok/s and 4K context.

What context window can Pixtral 12B use on GTX 1660 Super 6GB?

On GTX 1660 Super 6GB, Pixtral 12B can safely use up to 4K tokens of context. The model's official context limit is 131K, but available memory constrains the safe maximum.

What should I upgrade first if Pixtral 12B feels slow on GTX 1660 Super 6GB?

Add more VRAM headroom. The first useful upgrade is more dedicated VRAM so you can fit the model without shrinking context or dropping to a much lower quant.

See all results for GTX 1660 Super 6GB See all hardware for Pixtral 12B

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