Can Granite 4.1 8B run on RX 6950 XT 16GB?

YES — Runs Great

A79Great

Estimated from fit model

Granite 4.1 8B needs ~9.8 GB VRAM. RX 6950 XT 16GB has 16.0 GB. With Q4_K_M quantization, expect ~74 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) — 9.8 GB, 73.6 tok/s, Runs well

9.8 GB required16.0 GB available

61% VRAM used

Fit status

Runs well

Decode

73.6 tok/s

TTFT

2631 ms

Safe context

56K

Memory

9.8 GB / 16.0 GB

Memory breakdown

Weights4.9 GB

KV Cache2.4 GB

Runtime0.9 GB

Headroom1.6 GB

See how fast it feels

See how fast it feelsGranite 4.1 8B on RX 6950 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: 73.6 tok/s decode · 2.6s TTFT (warm) · 184 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	73.6 tok/s	1435 ms	56K
Coding	A	Runs well	73.6 tok/s	2631 ms	56K
Agentic Coding	A	Runs well	73.6 tok/s	3826 ms	56K
Reasoning	A	Runs well	73.6 tok/s	3109 ms	56K
RAG	A	Runs well	73.6 tok/s	4783 ms	56K

Quantization options

How Granite 4.1 8B (8B params) fits at each quantization level on RX 6950 XT 16GB (16.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	3.1 GB	Low	A71
Q3_K_S	3	3.9 GB	Low	A72
NVFP4	4	4.5 GB	Medium	A73
Q4_K_M	4	4.9 GB	Medium	A73
Q5_K_M	5	5.8 GB	High	A74
Q6_K	6	6.6 GB	High	A75
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 RX 6950 XT 16GB can run

Model	Params	Grade	Decode
Qwen 3.5 9B	9B	S	65.4 tok/s
Qwen 3 14B	14B	S	42.2 tok/s
Phi-4-reasoning-plus 14B	14.7B	S	40.1 tok/s
GPT-OSS 20B	21B	A	38.7 tok/s
Ministral 3 14B	14B	S	42.1 tok/s

Frequently asked questions

Can RX 6950 XT 16GB run Granite 4.1 8B?

Yes, RX 6950 XT 16GB can run Granite 4.1 8B with a A grade (Runs well). Expected decode speed: 73.6 tok/s.

How much VRAM does Granite 4.1 8B need?

Granite 4.1 8B (8B parameters) requires approximately 9.8 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 RX 6950 XT 16GB?

On RX 6950 XT 16GB, Granite 4.1 8B achieves approximately 73.6 tokens per second decode speed with a time-to-first-token of 2631ms using Q4_K_M quantization.

Can RX 6950 XT 16GB run Granite 4.1 8B for coding?

For coding workloads, Granite 4.1 8B on RX 6950 XT 16GB receives a A grade with 73.6 tok/s and 56K context.

What context window can Granite 4.1 8B use on RX 6950 XT 16GB?

On RX 6950 XT 16GB, Granite 4.1 8B can safely use up to 56K tokens of context. The model's official context limit is 131K, but available memory constrains the safe maximum.

See all results for RX 6950 XT 16GB See all hardware for Granite 4.1 8B

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