Can Gemma 3 12B run on RTX 5090 32GB?

YES — Runs Great

A83Great

Estimated from fit model

Gemma 3 12B needs ~16.6 GB VRAM. RTX 5090 32GB has 32.0 GB. With Q4_K_M quantization, expect ~168 tok/s.

Runtime: OllamaCapacity: RoomyBandwidth: HighStack: 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.

Capabilities:

Select quantization to explore

Q4_K_M (Medium quality) — 16.6 GB, 168.0 tok/s, Runs well

16.6 GB required32.0 GB available

52% VRAM used

Fit status

Runs well

Decode

168.0 tok/s

TTFT

1152 ms

Safe context

66K

Memory

16.6 GB / 32.0 GB

Memory breakdown

Weights7.3 GB

KV Cache4.9 GB

Runtime1.2 GB

Headroom3.2 GB

See how fast it feels

See how fast it feelsGemma 3 12B on RTX 5090 32GB
1st promptCold start — includes initialization
>Write a Python function to sort a list
Here's a Python function that sorts a list using quicksort:

def quicksort(arr):
    if len(arr) <= 1:
        return arr
    pivot = arr[len(arr) // 2]
    left   = [x for x in arr if x < pivot]
    middle = [x for x in arr if x == pivot]
    right  = [x for x in arr if x > pivot]
    return quicksort(left) + middle + quicksort(right)

# Example usage
numbers = [3, 6, 8, 10, 1, 2, 1]
print(quicksort(numbers))  # [1, 1, 2, 3, 6, 8, 10]

The algorithm picks a pivot, partitions the list into smaller, equal, and larger elements, then recursively sorts each partition and concatenates the results.
2nd promptWarm — model ready, no init overhead
>Now add type hints and a docstring
def quicksort(arr: list[int]) -> list[int]:
    """Sort a list using the quicksort algorithm.

    Args:
        arr: List of integers to sort.

    Returns:
        A new sorted list.
    """
    if len(arr) <= 1:
        return arr
    pivot = arr[len(arr) // 2]
    left   = [x for x in arr if x < pivot]
    middle = [x for x in arr if x == pivot]
    right  = [x for x in arr if x > pivot]
    return quicksort(left) + middle + quicksort(right)

Added type hints for the input and return type, plus a Google-style docstring.
Estimated: 168.0 tok/s decode · 1.2s TTFT (warm) · 420 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	A	Runs well	168.0 tok/s	629 ms	66K
Coding	A	Runs well	168.0 tok/s	1152 ms	66K
Agentic Coding	S	Runs well	168.0 tok/s	1676 ms	66K
Reasoning	A	Runs well	168.0 tok/s	1362 ms	66K
RAG	S	Runs well	168.0 tok/s	2095 ms	66K

Quantization options

How Gemma 3 12B (12B params) fits at each quantization level on RTX 5090 32GB (32.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	4.7 GB	Low	A73
Q3_K_S	3	5.9 GB	Low	A74
NVFP4	4	6.7 GB	Medium	A74
Q4_K_M	4	7.3 GB	Medium	A74
Q5_K_M	5	8.6 GB	High	A75
Q6_K	6	9.8 GB	High	A75
Q8_0	8	12.8 GB	Very High	A77
F16Best for your GPU	16	24.6 GB	Maximum	A78

Get started

Copy-paste commands to run Gemma 3 12B on your machine.

Run

ollama run gemma3:12b

Your hardware

More models your RTX 5090 32GB can run

Model	Params	Grade	Decode
Qwen3-Coder 30B A3B Instruct	30.5B	S	181.6 tok/s
Qwen 3.5 27B	27B	S	78.7 tok/s
Qwen 3.6 27B	27B	S	79 tok/s
Qwen 3.6 35B A3B	35B	S	128.2 tok/s
Qwen3-VL 30B A3B Instruct	30B	S	187.8 tok/s

Frequently asked questions

Can RTX 5090 32GB run Gemma 3 12B?

Yes, RTX 5090 32GB can run Gemma 3 12B with a A grade (Runs well). Expected decode speed: 168.0 tok/s.

How much VRAM does Gemma 3 12B need?

Gemma 3 12B (12B parameters) requires approximately 16.6 GB of memory with Q4_K_M quantization.

What is the best quantization for Gemma 3 12B?

The recommended quantization for Gemma 3 12B is Q4_K_M, which balances quality and memory efficiency.

What speed will Gemma 3 12B run at on RTX 5090 32GB?

On RTX 5090 32GB, Gemma 3 12B achieves approximately 168.0 tokens per second decode speed with a time-to-first-token of 1152ms using Q4_K_M quantization.

Can RTX 5090 32GB run Gemma 3 12B for coding?

For coding workloads, Gemma 3 12B on RTX 5090 32GB receives a A grade with 168.0 tok/s and 66K context.

What context window can Gemma 3 12B use on RTX 5090 32GB?

On RTX 5090 32GB, Gemma 3 12B can safely use up to 66K tokens of context. The model's official context limit is 131K, but available memory constrains the safe maximum.

See all results for RTX 5090 32GB See all hardware for Gemma 3 12B

Embed this result▼

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<iframe src="https://willitrunai.com/embed/gemma-3-12b-on-rtx-5090-32gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>

Preview:

Workload

Grade

Fit

Decode

TTFT

Context

Chat

Runs well

168.0 tok/s

629 ms

66K

Coding

Runs well

168.0 tok/s

1152 ms

66K

Agentic Coding

Runs well

168.0 tok/s

1676 ms

66K

Reasoning

Runs well

168.0 tok/s

1362 ms

66K

RAG

Runs well

168.0 tok/s

2095 ms

66K

Quant

Bits

VRAM

Quality

Fit

Q2_K

4.7 GB

Low

A73

Q3_K_S

5.9 GB

Low

A74

NVFP4

6.7 GB

Medium

A74

Q4_K_M

7.3 GB

Medium

A74

Q5_K_M

8.6 GB

High

A75

Q6_K

9.8 GB

High

A75

Q8_0

12.8 GB

Very High

A77

F16Best for your GPU

24.6 GB

Maximum

A78

Model

Params

Grade

Decode

Capabilities

Qwen3-Coder 30B A3B Instruct

30.5B

181.6 tok/s

Qwen 3.5 27B

27B

78.7 tok/s

Qwen 3.6 27B

27B

79 tok/s

Qwen 3.6 35B A3B

35B

128.2 tok/s

Qwen3-VL 30B A3B Instruct

30B

187.8 tok/s

Frequently asked questions

Can RTX 5090 32GB run Gemma 3 12B?

Yes, RTX 5090 32GB can run Gemma 3 12B with a A grade (Runs well). Expected decode speed: 168.0 tok/s.

How much VRAM does Gemma 3 12B need?

Gemma 3 12B (12B parameters) requires approximately 16.6 GB of memory with Q4_K_M quantization.

What is the best quantization for Gemma 3 12B?

The recommended quantization for Gemma 3 12B is Q4_K_M, which balances quality and memory efficiency.

What speed will Gemma 3 12B run at on RTX 5090 32GB?

On RTX 5090 32GB, Gemma 3 12B achieves approximately 168.0 tokens per second decode speed with a time-to-first-token of 1152ms using Q4_K_M quantization.

Can RTX 5090 32GB run Gemma 3 12B for coding?

For coding workloads, Gemma 3 12B on RTX 5090 32GB receives a A grade with 168.0 tok/s and 66K context.

What context window can Gemma 3 12B use on RTX 5090 32GB?

On RTX 5090 32GB, Gemma 3 12B can safely use up to 66K tokens of context. The model's official context limit is 131K, but available memory constrains the safe maximum.