Can Qwen 3.6 35B A3B run on GTX 1660 Super 6GB?

Q: What should I upgrade first if Qwen 3.6 35B A3B feels slow on GTX 1660 Super 6GB?

Add more VRAM headroom. The first useful upgrade is more dedicated VRAM so you can fit the model without shrinking context or dropping to a much lower quant.

NO — Won't Fit

F0Won't run

Estimated from fit model

Qwen 3.6 35B A3B needs ~28.5 GB but GTX 1660 Super 6GB only has 6.0 GB. Try a smaller quantization or lighter model.

Runtime: vLLMCapacity: No fitBandwidth: LowStack: OptimizedBottleneck: Memory capacity

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) — 28.5 GB, exceeds 6.0 GB available

28.5 GB required6.0 GB available

475% VRAM needed

22.5 GB over capacity — needs offload or smaller quantization

Fit status

Too heavy

Decode

2.7 tok/s

TTFT

72313 ms

Safe context

Memory

28.5 GB / 6.0 GB

Offload

80%

Memory breakdown

Weights21.3 GB

KV Cache4.1 GB

Runtime2.4 GB

Headroom0.6 GB

See how fast it feels

With memory offload — actual speed may be lower

See how fast it feelsQwen 3.6 35B A3B on GTX 1660 Super 6GB
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: 2.7 tok/s decode · 72.3s TTFT (warm) · 7 tok/s prefill

What limits this setup

Usable VRAM is the main blocker for this model.

Not enough usable memory

The model needs 28.5 GB, but this setup only exposes 6.0 GB of usable VRAM.

Older PCIe generation

PCIe 3.0 is workable, but it compounds the penalty when you offload heavily or try to scale across multiple cards.

Best improvement path

Add more VRAM headroom

The first useful upgrade is more dedicated VRAM so you can fit the model without shrinking context or dropping to a much lower quant.

Performance by workload

Workload	Grade	Fit	Decode	TTFT	Context
Chat	F	Too heavy	2.7 tok/s	39444 ms	4K
Coding	F	Too heavy	2.7 tok/s	72313 ms	4K
Agentic Coding	F	Too heavy	2.7 tok/s	105183 ms	4K
Reasoning	F	Too heavy	2.7 tok/s	85461 ms	4K
RAG	F	Too heavy	2.7 tok/s	131479 ms	4K

Quantization options

How Qwen 3.6 35B A3B (35B params) fits at each quantization level on GTX 1660 Super 6GB (6.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	13.7 GB	Low	F0
Q3_K_S	3	17.2 GB	Low	F0
NVFP4	4

Upgrade options

Hardware that runs Qwen 3.6 35B A3B well

RTX A6000 48GBBudget pick

48 GB VRAM (+42)768 GB/s (+432)

Makes the model fit on the accelerator instead of staying completely out of reach.56.4 tok/s decode

Makes the model fit on the accelerator instead of staying completely out of reach.

Removes host-memory offload, which is usually the single biggest latency and throughput win.

~$4,650 MSRP

RTX PRO 5000 Blackwell 48GBBest value

48 GB VRAM (+42)1344 GB/s (+1008)

Makes the model fit on the accelerator instead of staying completely out of reach.109 tok/s decode

Makes the model fit on the accelerator instead of staying completely out of reach.

Removes host-memory offload, which is usually the single biggest latency and throughput win.

~$4,999 MSRP

Quadro RTX 8000 48GBNVIDIA upgrade

48 GB VRAM (+42)672 GB/s (+336)

Makes the model fit on the accelerator instead of staying completely out of reach.44.8 tok/s decode

Makes the model fit on the accelerator instead of staying completely out of reach.

Removes host-memory offload, which is usually the single biggest latency and throughput win.

~$5,800 MSRP

Frequently asked questions

Can GTX 1660 Super 6GB run Qwen 3.6 35B A3B?

No, Qwen 3.6 35B A3B requires more memory than GTX 1660 Super 6GB provides.

How much VRAM does Qwen 3.6 35B A3B need?

Qwen 3.6 35B A3B (35B parameters) requires approximately 28.5 GB of memory with Q4_K_M quantization.

What is the best quantization for Qwen 3.6 35B A3B?

The recommended quantization for Qwen 3.6 35B A3B is Q4_K_M, which balances quality and memory efficiency.

What speed will Qwen 3.6 35B A3B run at on GTX 1660 Super 6GB?

On GTX 1660 Super 6GB, Qwen 3.6 35B A3B achieves approximately 2.7 tokens per second decode speed with a time-to-first-token of 72313ms using Q4_K_M quantization.

Can GTX 1660 Super 6GB run Qwen 3.6 35B A3B for coding?

For coding workloads, Qwen 3.6 35B A3B on GTX 1660 Super 6GB receives a F grade with 2.7 tok/s and 4K context.

What context window can Qwen 3.6 35B A3B use on GTX 1660 Super 6GB?

On GTX 1660 Super 6GB, Qwen 3.6 35B A3B can safely use up to 4K tokens of context. The model's official context limit is 262K, but available memory constrains the safe maximum.

What should I upgrade first if Qwen 3.6 35B A3B feels slow on GTX 1660 Super 6GB?

See all results for GTX 1660 Super 6GB See all hardware for Qwen 3.6 35B A3B

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