Can Qwen 3.5 9B run on RX 6900 XT 16GB?

YES — Runs Great

S95Excellent

Estimated from fit model

Qwen 3.5 9B needs ~10.2 GB VRAM. RX 6900 XT 16GB has 16.0 GB. With Q4_K_M quantization, expect ~53 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: 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) — 10.2 GB, 57.1 tok/s, Runs well

10.2 GB required16.0 GB available

64% VRAM used

Fit status

Runs well

Decode

57.1 tok/s

TTFT

3388 ms

Safe context

58K

Memory

10.2 GB / 16.0 GB

Memory breakdown

Weights5.5 GB

KV Cache2.2 GB

Runtime0.9 GB

Headroom1.6 GB

See how fast it feels

See how fast it feelsQwen 3.5 9B on RX 6900 XT 16GB
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: 57.1 tok/s decode · 3.4s TTFT (warm) · 143 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	57.1 tok/s	1848 ms	58K
Coding	S	Runs well	53.2 tok/s	3642 ms	58K
Agentic Coding	S	Runs well	57.1 tok/s	4928 ms	58K
Reasoning	S	Runs well	57.1 tok/s	4004 ms	58K
RAG	S	Runs well	57.1 tok/s	6160 ms	58K

Quantization options

How Qwen 3.5 9B (9B params) fits at each quantization level on RX 6900 XT 16GB (16.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	3.5 GB	Low	S89
Q3_K_S	3	4.4 GB	Low	S90
NVFP4	4

Get started

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

Run

ollama run qwen3.5:9b

Frequently asked questions

Can RX 6900 XT 16GB run Qwen 3.5 9B?

Yes, RX 6900 XT 16GB can run Qwen 3.5 9B with a S grade (Runs well). Expected decode speed: 53.2 tok/s.

How much VRAM does Qwen 3.5 9B need?

Qwen 3.5 9B (9B parameters) requires approximately 10.2 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 RX 6900 XT 16GB?

On RX 6900 XT 16GB, Qwen 3.5 9B achieves approximately 53.2 tokens per second decode speed with a time-to-first-token of 3642ms using Q4_K_M quantization.

Can RX 6900 XT 16GB run Qwen 3.5 9B for coding?

For coding workloads, Qwen 3.5 9B on RX 6900 XT 16GB receives a S grade with 53.2 tok/s and 58K context.

What context window can Qwen 3.5 9B use on RX 6900 XT 16GB?

On RX 6900 XT 16GB, Qwen 3.5 9B can safely use up to 58K tokens of context. The model's official context limit is 131K, but available memory constrains the safe maximum.

See all results for RX 6900 XT 16GB See all hardware for Qwen 3.5 9B

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