Can Granite 4.1 8B run on Radeon RX 6850M XT 12GB?

YES — Runs Great

A79Great

Estimated from fit model

Granite 4.1 8B needs ~9.4 GB VRAM. Radeon RX 6850M XT 12GB has 12.0 GB. With Q4_K_M quantization, expect ~53 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: LowStack: 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) — 9.4 GB, 53.3 tok/s, Runs well

9.4 GB required12.0 GB available

78% VRAM used

Fit status

Runs well

Decode

53.3 tok/s

TTFT

3633 ms

Safe context

33K

Memory

9.4 GB / 12.0 GB

Memory breakdown

Weights4.9 GB

KV Cache2.4 GB

Runtime0.9 GB

Headroom1.2 GB

See how fast it feels

See how fast it feelsGranite 4.1 8B on Radeon RX 6850M XT 12GB
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: 53.3 tok/s decode · 3.6s TTFT (warm) · 133 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	53.3 tok/s	1982 ms	33K
Coding	A	Runs well	53.3 tok/s	3633 ms	33K
Agentic Coding	A	Runs with offload	53.3 tok/s	5284 ms	33K
Reasoning	A	Runs well	53.3 tok/s	4293 ms	33K
RAG	A	Runs with offload	53.3 tok/s	6605 ms	33K

Quantization options

How Granite 4.1 8B (8B params) fits at each quantization level on Radeon RX 6850M XT 12GB (12.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	3.1 GB	Low	A74
Q3_K_S	3	3.9 GB	Low	A75
NVFP4	4	4.5 GB	Medium	A76
Q4_K_M	4	4.9 GB	Medium	A76
Q5_K_M	5	5.8 GB	High	A77
Q6_K	6	6.6 GB	High	A76
Q8_0Best for your GPU	8	8.6 GB	Very High	A76
F16	16	16.4 GB	Maximum	F0

Get started

Copy-paste commands to run Granite 4.1 8B on your machine.

Run

ollama run granite4.1:8b

Your hardware

More models your Radeon RX 6850M XT 12GB can run

Model	Params	Grade	Decode
Qwen 3.5 9B	9B	S	47.4 tok/s
Qwen 3 14B	14B	A	19.1 tok/s
Phi-4-reasoning-plus 14B	14.7B	A	15.4 tok/s
Ministral 3 14B	14B	A	19 tok/s
Phi-4 14B	14B	A	17.3 tok/s

Frequently asked questions

Can Radeon RX 6850M XT 12GB run Granite 4.1 8B?

Yes, Radeon RX 6850M XT 12GB can run Granite 4.1 8B with a A grade (Runs well). Expected decode speed: 53.3 tok/s.

How much VRAM does Granite 4.1 8B need?

Granite 4.1 8B (8B parameters) requires approximately 9.4 GB of memory with Q4_K_M quantization.

What is the best quantization for Granite 4.1 8B?

The recommended quantization for Granite 4.1 8B is Q4_K_M, which balances quality and memory efficiency.

What speed will Granite 4.1 8B run at on Radeon RX 6850M XT 12GB?

On Radeon RX 6850M XT 12GB, Granite 4.1 8B achieves approximately 53.3 tokens per second decode speed with a time-to-first-token of 3633ms using Q4_K_M quantization.

Can Radeon RX 6850M XT 12GB run Granite 4.1 8B for coding?

For coding workloads, Granite 4.1 8B on Radeon RX 6850M XT 12GB receives a A grade with 53.3 tok/s and 33K context.

What context window can Granite 4.1 8B use on Radeon RX 6850M XT 12GB?

On Radeon RX 6850M XT 12GB, Granite 4.1 8B can safely use up to 33K tokens of context. The model's official context limit is 131K, but available memory constrains the safe maximum.

See all results for Radeon RX 6850M XT 12GB See all hardware for Granite 4.1 8B

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