Can DevStral 7B run on NVIDIA DGX Spark 128GB?

Q: Is unified memory on NVIDIA DGX Spark 128GB as fast as VRAM for DevStral 7B?

Not always. NVIDIA DGX Spark 128GB can often fit larger models thanks to unified memory, but a discrete GPU with dedicated high-bandwidth VRAM may still decode faster once the model fits. For this combination, the important distinction is capacity versus sustained throughput.

YES — Runs Great

B68Good

Estimated from fit model

DevStral 7B needs ~20.5 GB VRAM. NVIDIA DGX Spark 128GB has 108.8 GB. With Q4_K_M quantization, expect ~41 tok/s.

Runtime: OllamaCapacity: RoomyBandwidth: LowStack: 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) — 20.5 GB, 41.2 tok/s, Runs well

20.5 GB required108.8 GB available

19% VRAM used

Fit status

Runs well

Decode

41.2 tok/s

TTFT

4695 ms

Safe context

Memory

20.5 GB / 108.8 GB

Memory breakdown

Weights4.3 GB

KV Cache2.0 GB

Runtime1.2 GB

Headroom13.1 GB

See how fast it feels

See how fast it feelsDevStral 7B on NVIDIA DGX Spark 128GB
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: 41.2 tok/s decode · 4.7s TTFT (warm) · 103 tok/s prefill

What limits this setup

This setup is broadly balanced for this model.

Shared-memory contention still exists

The OS, browser, and inference runtime all compete for the same physical memory pool, so real-world headroom is less forgiving than raw capacity suggests.

Best improvement path

Performance by workload

Workload	Grade	Fit	Decode	TTFT	Context
Chat	B	Runs well	41.2 tok/s	2561 ms	8K
Coding	B	Runs well	41.2 tok/s	4695 ms	8K
Agentic Coding	B	Runs well	41.2 tok/s	6829 ms	8K
Reasoning	B	Runs well	41.2 tok/s	5548 ms	8K
RAG	B	Runs well	41.2 tok/s	8536 ms	8K

Quantization options

How DevStral 7B (7B params) fits at each quantization level on NVIDIA DGX Spark 128GB (92.2 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	2.7 GB	Low	B64
Q3_K_S	3	3.4 GB	Low	B64
NVFP4	4

Get started

Copy-paste commands to run DevStral 7B on your machine.

Run

ollama run devstral

Upgrade options

Hardware that runs DevStral 7B well

NVIDIA H200 141GBBudget pick

141 GB VRAM (+13)4800 GB/s (+4527)

Raises estimated decode speed by about 138%.98 tok/s decode

Raises estimated decode speed by about 138%.

Adds memory headroom for longer context windows and future model growth.

~$30,000 MSRP

NVIDIA H200 PCIe 141GBBest value

141 GB VRAM (+13)4800 GB/s (+4527)

Raises estimated decode speed by about 138%.98 tok/s decode

Raises estimated decode speed by about 138%.

Adds memory headroom for longer context windows and future model growth.

~$30,000 MSRP

NVIDIA B200 180GBNVIDIA upgrade

180 GB VRAM (+52)8000 GB/s (+7727)

Raises estimated decode speed by about 138%.98 tok/s decode

Raises estimated decode speed by about 138%.

Adds memory headroom for longer context windows and future model growth.

~$30,000 MSRP

Frequently asked questions

Can NVIDIA DGX Spark 128GB run DevStral 7B?

Yes, NVIDIA DGX Spark 128GB can run DevStral 7B with a B grade (Runs well). Expected decode speed: 41.2 tok/s.

How much VRAM does DevStral 7B need?

DevStral 7B (7B parameters) requires approximately 20.5 GB of memory with Q4_K_M quantization.

What is the best quantization for DevStral 7B?

The recommended quantization for DevStral 7B is Q4_K_M, which balances quality and memory efficiency.

What speed will DevStral 7B run at on NVIDIA DGX Spark 128GB?

On NVIDIA DGX Spark 128GB, DevStral 7B achieves approximately 41.2 tokens per second decode speed with a time-to-first-token of 4695ms using Q4_K_M quantization.

Can NVIDIA DGX Spark 128GB run DevStral 7B for coding?

For coding workloads, DevStral 7B on NVIDIA DGX Spark 128GB receives a B grade with 41.2 tok/s and 8K context.

What context window can DevStral 7B use on NVIDIA DGX Spark 128GB?

On NVIDIA DGX Spark 128GB, DevStral 7B can safely use up to 8K tokens of context. The model's official context limit is 8K, but available memory constrains the safe maximum.

Is unified memory on NVIDIA DGX Spark 128GB as fast as VRAM for DevStral 7B?

See all results for NVIDIA DGX Spark 128GB See all hardware for DevStral 7B

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