Can Qwen 3.5 27B run on NVIDIA L40 48GB?

YES — Runs Great

S94Excellent

Estimated from fit model

Qwen 3.5 27B needs ~25.6 GB VRAM. NVIDIA L40 48GB has 48.0 GB. With Q4_K_M quantization, expect ~44 tok/s.

Runtime: OllamaCapacity: RoomyBandwidth: HighStack: BasicBottleneck: 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) — 25.6 GB, 44.2 tok/s, Runs well

25.6 GB required48.0 GB available

53% VRAM used

Fit status

Runs well

Decode

44.2 tok/s

TTFT

4381 ms

Safe context

129K

Memory

25.6 GB / 48.0 GB

Memory breakdown

Weights16.5 GB

KV Cache3.2 GB

Runtime1.2 GB

Headroom4.8 GB

See how fast it feels

See how fast it feelsQwen 3.5 27B on NVIDIA L40 48GB
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: 44.2 tok/s decode · 4.4s TTFT (warm) · 111 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	44.2 tok/s	2390 ms	129K
Coding	S	Runs well	44.2 tok/s	4381 ms	129K
Agentic Coding	S	Runs well	44.2 tok/s	6372 ms	129K
Reasoning	S	Runs well	44.2 tok/s	5177 ms	129K
RAG	S	Runs well	44.2 tok/s	7965 ms	129K

Inference speed

Qwen 3.5 27B inference speed — tokens per second by GPU & Mac

Estimated decode speed (tokens/sec) for Qwen 3.5 27B at Q4_K_M across popular GPUs and Apple Silicon, using the fastest local runtime per device. Fastest is RTX 5090 32GB at ~79 tok/s. Speed is memory-bandwidth bound, so cards that fit the whole model in VRAM run far faster than ones that offload to system RAM.

GPU / Mac	Memory	Quant	Speed (tok/s)	Fits?
RTX 5090 32GB	32 GB	Q4_K_M	78.7	Fits
RTX 4090 24GB	24 GB	Q4_K_M	50.2	Offloads
RX 7900 XTX 24GB	24 GB	Q4_K_M	45.3	Offloads
RTX 3090 24GB	24 GB	Q4_K_M	43.0	Offloads
Mac Studio M3 Ultra 256GB	256 GB	Q4_K_M	36.5	Fits
MacBook Pro M4 Max 128GB	128 GB	Q4_K_M	36.1	Fits
MacBook Pro M4 Max 64GB	64 GB	Q4_K_M	36.1	Fits
Mac Studio M2 Ultra 128GB	128 GB	Q4_K_M	30.4	Fits
Mac Studio M1 Ultra 128GB	128 GB	Q4_K_M	28.9	Fits
MacBook Pro M4 Pro 48GB	48 GB	Q4_K_M	22.7	Fits
MacBook Pro M3 Max 64GB	64 GB	Q4_K_M	15.7	Fits
RTX 4080 Super 16GB	16 GB	Q4_K_M	14.7	Too big
MacBook Pro M1 Max 64GB	64 GB	Q4_K_M	14.4	Fits
RTX 4070 12GB	12 GB	Q4_K_M	5.2	Too big
RTX 3060 12GB	12 GB	Q4_K_M	3.2	Too big
RTX 4060 8GB	8 GB	Q4_K_M	2.0	Too big

Estimates for single-stream decoding at Q4_K_M; real tokens/sec varies with prompt length, context, batch size, and runtime build. Prompt processing (prefill) is faster than the decode figures shown here.

Quantization options

How Qwen 3.5 27B (27B params) fits at each quantization level on NVIDIA L40 48GB (48.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	10.5 GB	Low	S86
Q3_K_S	3	13.2 GB	Low	S87
NVFP4	4	15.1 GB	Medium	S87
Q4_K_M	4	16.5 GB	Medium	S88
Q5_K_M	5	19.4 GB	High	S89
Q6_K	6	22.1 GB	High	S89
Q8_0Best for your GPU	8	28.9 GB	Very High	S91
F16	16	55.4 GB	Maximum	F0

Get started

Copy-paste commands to run Qwen 3.5 27B on your machine.

Run

ollama run qwen3.5:27b

Your hardware

More models your NVIDIA L40 48GB can run

Model	Params	Grade	Decode	Capabilities
Qwen3-Coder 30B A3B Instruct	30.5B	S	101.9 tok/s

Frequently asked questions

Can NVIDIA L40 48GB run Qwen 3.5 27B?

Yes, NVIDIA L40 48GB can run Qwen 3.5 27B with a S grade (Runs well). Expected decode speed: 44.2 tok/s.

How much VRAM does Qwen 3.5 27B need?

Qwen 3.5 27B (27B parameters) requires approximately 25.6 GB of memory with Q4_K_M quantization.

What is the best quantization for Qwen 3.5 27B?

The recommended quantization for Qwen 3.5 27B is Q4_K_M, which balances quality and memory efficiency.

What speed will Qwen 3.5 27B run at on NVIDIA L40 48GB?

On NVIDIA L40 48GB, Qwen 3.5 27B achieves approximately 44.2 tokens per second decode speed with a time-to-first-token of 4381ms using Q4_K_M quantization.

Can NVIDIA L40 48GB run Qwen 3.5 27B for coding?

For coding workloads, Qwen 3.5 27B on NVIDIA L40 48GB receives a S grade with 44.2 tok/s and 129K context.

What context window can Qwen 3.5 27B use on NVIDIA L40 48GB?

On NVIDIA L40 48GB, Qwen 3.5 27B can safely use up to 129K tokens of context. The model's official context limit is 131K, but available memory constrains the safe maximum.

See all results for NVIDIA L40 48GB See all hardware for Qwen 3.5 27B

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