Can Codestral Mamba 7B run on RX 6900 XT 16GB?

YES — Runs Great

A76Great

Estimated from fit model

Codestral Mamba 7B needs ~7.3 GB VRAM. RX 6900 XT 16GB has 16.0 GB. With Q4_K_M quantization, expect ~79 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) — 7.3 GB, 78.6 tok/s, Runs well

7.3 GB required16.0 GB available

46% VRAM used

Fit status

Runs well

Decode

78.6 tok/s

TTFT

2463 ms

Safe context

262K

Memory

7.3 GB / 16.0 GB

Memory breakdown

Weights4.3 GB

KV Cache0.5 GB

Runtime0.9 GB

Headroom1.6 GB

See how fast it feels

See how fast it feelsCodestral Mamba 7B 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: 78.6 tok/s decode · 2.5s TTFT (warm) · 197 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	78.6 tok/s	1344 ms	262K
Coding	A	Runs well	78.6 tok/s	2463 ms	262K
Agentic Coding	A	Runs well	78.6 tok/s	3583 ms	262K
Reasoning	A	Runs well	78.6 tok/s	2911 ms	262K
RAG	A	Runs well	78.6 tok/s	4478 ms	262K

Quantization options

How Codestral Mamba 7B (7B params) fits at each quantization level on RX 6900 XT 16GB (16.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	2.7 GB	Low	A72
Q3_K_S	3	3.4 GB	Low	A72
NVFP4	4	3.9 GB	Medium	A73
Q4_K_M	4	4.3 GB	Medium	A73
Q5_K_M	5	5.0 GB	High	A74
Q6_K	6	5.7 GB	High	A75
Q8_0Best for your GPU	8	7.5 GB	Very High	A76
F16	16	14.3 GB	Maximum	F0

Get started

Copy-paste commands to run Codestral Mamba 7B on your machine.

Run

docker run --rm -it ghcr.io/ggerganov/llama.cpp:full \
  --hf-repo "mistralai/Mamba-Codestral-7B-v0.1" \
  --hf-file "Mamba-Codestral-7B-v0.1-Q4_K_M.gguf" \
  -c 4096 -ngl 99

Your hardware

More models your RX 6900 XT 16GB can run

Model	Params	Grade	Decode
Qwen 3.5 9B	9B	S	57.1 tok/s
Qwen 3 14B	14B	S	36.9 tok/s
Qwen 3 8B	8B	S	64.3 tok/s
Phi-4-reasoning-plus 14B	14.7B	S	35 tok/s
GPT-OSS 20B	21B	A	33.8 tok/s

Frequently asked questions

Can RX 6900 XT 16GB run Codestral Mamba 7B?

Yes, RX 6900 XT 16GB can run Codestral Mamba 7B with a A grade (Runs well). Expected decode speed: 78.6 tok/s.

How much VRAM does Codestral Mamba 7B need?

Codestral Mamba 7B (7B parameters) requires approximately 7.3 GB of memory with Q4_K_M quantization.

What is the best quantization for Codestral Mamba 7B?

The recommended quantization for Codestral Mamba 7B is Q4_K_M, which balances quality and memory efficiency.

What speed will Codestral Mamba 7B run at on RX 6900 XT 16GB?

On RX 6900 XT 16GB, Codestral Mamba 7B achieves approximately 78.6 tokens per second decode speed with a time-to-first-token of 2463ms using Q4_K_M quantization.

Can RX 6900 XT 16GB run Codestral Mamba 7B for coding?

For coding workloads, Codestral Mamba 7B on RX 6900 XT 16GB receives a A grade with 78.6 tok/s and 262K context.

What context window can Codestral Mamba 7B use on RX 6900 XT 16GB?

On RX 6900 XT 16GB, Codestral Mamba 7B can safely use up to 262K tokens of context. The model's official context limit is 262K, but available memory constrains the safe maximum.

See all results for RX 6900 XT 16GB See all hardware for Codestral Mamba 7B

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