Can Devstral 2 123B Instruct run on AMD Instinct MI325X 256GB?

YES — Runs Great

S93Excellent

Estimated from fit model

Devstral 2 123B Instruct needs ~106.9 GB VRAM. AMD Instinct MI325X 256GB has 256.0 GB. With Q4_K_M quantization, expect ~64 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: 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) — 106.9 GB, 63.5 tok/s, Runs well

106.9 GB required256.0 GB available

42% VRAM used

Fit status

Runs well

Decode

63.5 tok/s

TTFT

3050 ms

Safe context

256K

Memory

106.9 GB / 256.0 GB

Memory breakdown

Weights75.0 GB

KV Cache5.4 GB

Runtime0.9 GB

Headroom25.6 GB

See how fast it feels

See how fast it feelsDevstral 2 123B Instruct on AMD Instinct MI325X 256GB
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: 63.5 tok/s decode · 3.0s TTFT (warm) · 159 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	63.5 tok/s	1663 ms	256K
Coding	S	Runs well	63.5 tok/s	3050 ms	256K
Agentic Coding	S	Runs well	63.5 tok/s	4436 ms	256K
Reasoning	S	Runs well	63.5 tok/s	3604 ms	256K
RAG	S	Runs well	63.5 tok/s	5545 ms	256K

Quantization options

How Devstral 2 123B Instruct (123B params) fits at each quantization level on AMD Instinct MI325X 256GB (256.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	48.0 GB	Low	A83
Q3_K_S	3	60.3 GB	Low	A84
NVFP4	4	68.9 GB	Medium	A85
Q4_K_M	4	75.0 GB	Medium	S85
Q5_K_M	5	88.6 GB	High	S86
Q6_K	6	100.9 GB	High	S87
Q8_0Best for your GPU	8	131.6 GB	Very High	S90
F16	16	252.2 GB	Maximum	F0

Get started

Copy-paste commands to run Devstral 2 123B Instruct on your machine.

Run

lms load Devstral-2-123B-Instruct-2512 && lms server start

Your hardware

More models your AMD Instinct MI325X 256GB can run

Model	Params	Grade	Decode	Capabilities
Qwen 3.5 397B A17B	397B	A	39.2 tok/s

Frequently asked questions

Can AMD Instinct MI325X 256GB run Devstral 2 123B Instruct?

Yes, AMD Instinct MI325X 256GB can run Devstral 2 123B Instruct with a S grade (Runs well). Expected decode speed: 63.5 tok/s.

How much VRAM does Devstral 2 123B Instruct need?

Devstral 2 123B Instruct (123B parameters) requires approximately 106.9 GB of memory with Q4_K_M quantization.

What is the best quantization for Devstral 2 123B Instruct?

The recommended quantization for Devstral 2 123B Instruct is Q4_K_M, which balances quality and memory efficiency.

What speed will Devstral 2 123B Instruct run at on AMD Instinct MI325X 256GB?

On AMD Instinct MI325X 256GB, Devstral 2 123B Instruct achieves approximately 63.5 tokens per second decode speed with a time-to-first-token of 3050ms using Q4_K_M quantization.

Can AMD Instinct MI325X 256GB run Devstral 2 123B Instruct for coding?

For coding workloads, Devstral 2 123B Instruct on AMD Instinct MI325X 256GB receives a S grade with 63.5 tok/s and 256K context.

What context window can Devstral 2 123B Instruct use on AMD Instinct MI325X 256GB?

On AMD Instinct MI325X 256GB, Devstral 2 123B Instruct can safely use up to 256K tokens of context. The model's official context limit is 256K, but available memory constrains the safe maximum.

See all results for AMD Instinct MI325X 256GB See all hardware for Devstral 2 123B Instruct

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