Can Qwen 3.5 9B run on RTX 4090 24GB?

YES — Runs Great

S94Excellent

Estimated from fit model

Qwen 3.5 9B needs ~11.3 GB VRAM. RTX 4090 24GB has 24.0 GB. With Q4_K_M quantization, expect ~126 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) — 11.3 GB, 126.0 tok/s, Runs well

11.3 GB required24.0 GB available

47% VRAM used

Fit status

Runs well

Decode

126.0 tok/s

TTFT

1537 ms

Safe context

109K

Memory

11.3 GB / 24.0 GB

Memory breakdown

Weights5.5 GB

KV Cache2.2 GB

Runtime1.2 GB

Headroom2.4 GB

See how fast it feels

See how fast it feelsQwen 3.5 9B on RTX 4090 24GB
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: 126.0 tok/s decode · 1.5s TTFT (warm) · 315 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	Runs well	126.0 tok/s	838 ms	109K
Coding	S	Runs well	126.0 tok/s	1537 ms	109K
Agentic Coding	S	Runs well	126.0 tok/s	2235 ms	109K
Reasoning	S	Runs well	126.0 tok/s	1816 ms	109K
RAG	S	Runs well	126.0 tok/s	2794 ms	109K

Quantization options

How Qwen 3.5 9B (9B params) fits at each quantization level on RTX 4090 24GB (24.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	3.5 GB	Low	S86
Q3_K_S	3	4.4 GB	Low	S87
NVFP4	4	5.0 GB	Medium	S87
Q4_K_M	4	5.5 GB	Medium	S87
Q5_K_M	5	6.5 GB	High	S88
Q6_K	6	7.4 GB	High	S88
Q8_0	8	9.6 GB	Very High	S90
F16Best for your GPU	16	18.5 GB	Maximum	S91

Get started

Copy-paste commands to run Qwen 3.5 9B on your machine.

Run

ollama run qwen3.5:9b

Your hardware

More models your RTX 4090 24GB can run

Model	Params	Grade	Decode
Qwen3-Coder 30B A3B Instruct	30.5B	S	115.8 tok/s
Qwen 3.5 27B	27B	S	50.2 tok/s
Qwen 3.6 27B	27B	S	50.4 tok/s
Qwen3-VL 30B A3B Instruct	30B	S	119.8 tok/s

Frequently asked questions

Can RTX 4090 24GB run Qwen 3.5 9B?

Yes, RTX 4090 24GB can run Qwen 3.5 9B with a S grade (Runs well). Expected decode speed: 126.0 tok/s.

How much VRAM does Qwen 3.5 9B need?

Qwen 3.5 9B (9B parameters) requires approximately 11.3 GB of memory with Q4_K_M quantization.

What is the best quantization for Qwen 3.5 9B?

The recommended quantization for Qwen 3.5 9B is Q4_K_M, which balances quality and memory efficiency.

What speed will Qwen 3.5 9B run at on RTX 4090 24GB?

On RTX 4090 24GB, Qwen 3.5 9B achieves approximately 126.0 tokens per second decode speed with a time-to-first-token of 1537ms using Q4_K_M quantization.

Can RTX 4090 24GB run Qwen 3.5 9B for coding?

For coding workloads, Qwen 3.5 9B on RTX 4090 24GB receives a S grade with 126.0 tok/s and 109K context.

What context window can Qwen 3.5 9B use on RTX 4090 24GB?

On RTX 4090 24GB, Qwen 3.5 9B can safely use up to 109K tokens of context. The model's official context limit is 131K, but available memory constrains the safe maximum.

See all results for RTX 4090 24GB See all hardware for Qwen 3.5 9B

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<iframe src="https://willitrunai.com/embed/qwen-3.5-9b-on-rtx-4090-24gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>

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