Can Devstral Small 2 24B Instruct run on RTX 4090 24GB?

YES — Tight Fit

S93Excellent

Measured on real hardware· rtx-4090-24gb

Devstral Small 2 24B Instruct needs ~20.4 GB VRAM. RTX 4090 24GB has 24.0 GB. With Q4_K_M quantization, expect ~40 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) — 20.4 GB, 40.0 tok/s, Tight fit

20.4 GB required24.0 GB available

85% VRAM used

Fit status

Tight fit

Decode

40.0 tok/s

TTFT

4845 ms

Safe context

40K

Memory

20.4 GB / 24.0 GB

Memory breakdown

Weights14.6 GB

KV Cache2.4 GB

Runtime0.9 GB

Headroom2.4 GB

See how fast it feels

See how fast it feelsDevstral Small 2 24B Instruct on RTX 4090 24GB
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: 40.0 tok/s decode · 4.8s TTFT (warm) · 100 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	40.0 tok/s	2018 ms	40K
Coding	S	Tight fit	40.0 tok/s	3700 ms	40K
Agentic Coding	S	Runs with offload	40.0 tok/s	5381 ms	40K
Reasoning	S	Tight fit	40.0 tok/s	4372 ms	40K
RAG	S	Runs with offload	40.0 tok/s	6727 ms	40K

Quantization options

How Devstral Small 2 24B Instruct (24B params) fits at each quantization level on RTX 4090 24GB (24.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	9.4 GB	Low	S90
Q3_K_S	3	11.8 GB	Low	S92
NVFP4	4	13.4 GB	Medium	S91
Q4_K_M	4	14.6 GB	Medium	S91
Q5_K_MBest for your GPU	5	17.3 GB	High	S91
Q6_K	6	19.7 GB	High	F0
Q8_0	8	25.7 GB	Very High	F0
F16	16	49.2 GB	Maximum	F0

Get started

Copy-paste commands to run Devstral Small 2 24B Instruct on your machine.

Run

ollama run devstral-small-2

Your hardware

More models your RTX 4090 24GB can run

Model	Params	Grade	Decode
Qwen3-Coder 30B A3B Instruct	30.5B	S	83.4 tok/s
Qwen 3.5 27B	27B	S	34.8 tok/s
Qwen 3.6 27B	27B	S	20.2 tok/s
Qwen 3.6 35B A3B	35B	A	53.4 tok/s
Qwen3-VL 30B A3B Instruct	30B	S	119.8 tok/s

Frequently asked questions

Can RTX 4090 24GB run Devstral Small 2 24B Instruct?

Yes, RTX 4090 24GB can run Devstral Small 2 24B Instruct with a S grade (Tight fit). Expected decode speed: 40.0 tok/s.

How much VRAM does Devstral Small 2 24B Instruct need?

Devstral Small 2 24B Instruct (24B parameters) requires approximately 20.4 GB of memory with Q4_K_M quantization.

What is the best quantization for Devstral Small 2 24B Instruct?

The recommended quantization for Devstral Small 2 24B Instruct is Q4_K_M, which balances quality and memory efficiency.

What speed will Devstral Small 2 24B Instruct run at on RTX 4090 24GB?

On RTX 4090 24GB, Devstral Small 2 24B Instruct achieves approximately 40.0 tokens per second decode speed with a time-to-first-token of 3700ms using Q4_K_M quantization.

Can RTX 4090 24GB run Devstral Small 2 24B Instruct for coding?

For coding workloads, Devstral Small 2 24B Instruct on RTX 4090 24GB receives a S grade with 40.0 tok/s and 40K context.

What context window can Devstral Small 2 24B Instruct use on RTX 4090 24GB?

On RTX 4090 24GB, Devstral Small 2 24B Instruct can safely use up to 40K tokens of context. The model's official context limit is 256K, but available memory constrains the safe maximum.

See all results for RTX 4090 24GB See all hardware for Devstral Small 2 24B Instruct

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