Can Codestral 21B Pruned i1 run on RTX 4090 24GB?

YES — Runs Great

C54Usable

Measured on real hardware· rtx-4090-24gb

Codestral 21B Pruned i1 needs ~18.6 GB VRAM. RTX 4090 24GB has 24.0 GB. With Q4_K_M quantization, expect ~45 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) — 18.6 GB, 47.0 tok/s, Runs well

18.6 GB required24.0 GB available

78% VRAM used

Fit status

Runs well

Decode

47.0 tok/s

TTFT

4122 ms

Safe context

51K

Memory

18.6 GB / 24.0 GB

Memory breakdown

Weights12.8 GB

KV Cache2.5 GB

Runtime0.9 GB

Headroom2.4 GB

See how fast it feels

See how fast it feelsCodestral 21B Pruned i1 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: 47.0 tok/s decode · 4.1s TTFT (warm) · 117 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	C	Runs well	47.0 tok/s	2249 ms	51K
Coding	C	Runs well	45.0 tok/s	3237 ms	51K
Agentic Coding	C	Tight fit	47.0 tok/s	5996 ms	51K
Reasoning	C	Runs well	47.0 tok/s	4872 ms	51K
RAG	C	Tight fit	47.0 tok/s	7495 ms	51K

Quantization options

How Codestral 21B Pruned i1 (21B params) fits at each quantization level on RTX 4090 24GB (24.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	8.2 GB	Low	C47
Q3_K_S	3	10.3 GB	Low	C49
NVFP4	4

Get started

Copy-paste commands to run Codestral 21B Pruned i1 on your machine.

Run

lms load hf-mradermacher--codestral-21b-pruned-i1-gguf && lms server start

Frequently asked questions

Can RTX 4090 24GB run Codestral 21B Pruned i1?

Yes, RTX 4090 24GB can run Codestral 21B Pruned i1 with a C grade (Runs well). Expected decode speed: 45.0 tok/s.

How much VRAM does Codestral 21B Pruned i1 need?

Codestral 21B Pruned i1 (21B parameters) requires approximately 18.6 GB of memory with Q4_K_M quantization.

What is the best quantization for Codestral 21B Pruned i1?

The recommended quantization for Codestral 21B Pruned i1 is Q4_K_M, which balances quality and memory efficiency.

What speed will Codestral 21B Pruned i1 run at on RTX 4090 24GB?

On RTX 4090 24GB, Codestral 21B Pruned i1 achieves approximately 45.0 tokens per second decode speed with a time-to-first-token of 3237ms using Q4_K_M quantization.

Can RTX 4090 24GB run Codestral 21B Pruned i1 for coding?

For coding workloads, Codestral 21B Pruned i1 on RTX 4090 24GB receives a C grade with 45.0 tok/s and 51K context.

What context window can Codestral 21B Pruned i1 use on RTX 4090 24GB?

On RTX 4090 24GB, Codestral 21B Pruned i1 can safely use up to 51K tokens of context. The model's official context limit is —, but available memory constrains the safe maximum.

See all results for RTX 4090 24GB See all hardware for Codestral 21B Pruned i1

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