Can Codestral 2 25.08 run on RX 7900 XT 20GB?

Q: What should I upgrade first if Codestral 2 25.08 feels slow on RX 7900 XT 20GB?

Buy headroom, not only minimum fit. A slightly larger memory tier gives you safer context growth and makes the recommendation more future-proof.

YES — Tight Fit

S85Excellent

Estimated from fit model

Codestral 2 25.08 needs ~18.8 GB VRAM. RX 7900 XT 20GB has 20.0 GB. With Q4_K_M quantization, expect ~36 tok/s.

Runtime: llama.cppCapacity: TightBandwidth: HighStack: 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) — 18.8 GB, 36.1 tok/s, Tight fit

18.8 GB required20.0 GB available

94% VRAM used

Fit status

Tight fit

Decode

36.1 tok/s

TTFT

5356 ms

Safe context

24K

Memory

18.8 GB / 20.0 GB

Memory breakdown

Weights13.4 GB

KV Cache2.4 GB

Runtime0.9 GB

Headroom2.0 GB

See how fast it feels

See how fast it feelsCodestral 2 25.08 on RX 7900 XT 20GB
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: 36.1 tok/s decode · 5.4s TTFT (warm) · 90 tok/s prefill

What limits this setup

This setup is broadly balanced for this model.

Very little memory headroom

You can run the model, but there is not much room left for longer context, bigger batches, extra apps, or future model updates.

Best improvement path

Buy headroom, not only minimum fit

A slightly larger memory tier gives you safer context growth and makes the recommendation more future-proof.

Performance by workload

Workload	Grade	Fit	Decode	TTFT	Context
Chat	S	Tight fit	36.1 tok/s	2922 ms	24K
Coding	S	Tight fit	36.1 tok/s	5356 ms	24K
Agentic Coding	A	Runs with offload (needs ~0.8 GB host RAM)	24.0 tok/s	11747 ms	24K
Reasoning	S	Tight fit	36.1 tok/s	6330 ms	24K
RAG	A	Runs with offload (needs ~0.8 GB host RAM)	24.0 tok/s	14684 ms

Quantization options

How Codestral 2 25.08 (22B params) fits at each quantization level on RX 7900 XT 20GB (20.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	8.6 GB	Low	A84
Q3_K_S	3	10.8 GB	Low	A85
NVFP4	4

Get started

Copy-paste commands to run Codestral 2 25.08 on your machine.

Run

lms load codestral-2508 && lms server start

Your hardware

More models your RX 7900 XT 20GB can run

Model	Params	Grade	Decode	Capabilities
Qwen3-Coder 30B A3B Instruct	30.5B	A	40.7 tok/s
Qwen 3.5 27B	27B	A	18.3 tok/s

Frequently asked questions

Can RX 7900 XT 20GB run Codestral 2 25.08?

Yes, RX 7900 XT 20GB can run Codestral 2 25.08 with a S grade (Tight fit). Expected decode speed: 36.1 tok/s.

How much VRAM does Codestral 2 25.08 need?

Codestral 2 25.08 (22B parameters) requires approximately 18.8 GB of memory with Q4_K_M quantization.

What is the best quantization for Codestral 2 25.08?

The recommended quantization for Codestral 2 25.08 is Q4_K_M, which balances quality and memory efficiency.

What speed will Codestral 2 25.08 run at on RX 7900 XT 20GB?

On RX 7900 XT 20GB, Codestral 2 25.08 achieves approximately 36.1 tokens per second decode speed with a time-to-first-token of 5356ms using Q4_K_M quantization.

Can RX 7900 XT 20GB run Codestral 2 25.08 for coding?

For coding workloads, Codestral 2 25.08 on RX 7900 XT 20GB receives a S grade with 36.1 tok/s and 24K context.

What context window can Codestral 2 25.08 use on RX 7900 XT 20GB?

On RX 7900 XT 20GB, Codestral 2 25.08 can safely use up to 24K tokens of context. The model's official context limit is 256K, but available memory constrains the safe maximum.

What should I upgrade first if Codestral 2 25.08 feels slow on RX 7900 XT 20GB?

See all results for RX 7900 XT 20GB See all hardware for Codestral 2 25.08

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