Is unified memory on NVIDIA DGX Spark 128GB as fast as VRAM for DiscoPOP zephyr 7b gemma?

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.

Can DiscoPOP zephyr 7b gemma run on NVIDIA DGX Spark 128GB?

YES — Runs Great

C42Usable

Estimated from fit model

DiscoPOP zephyr 7b gemma needs ~19.3 GB VRAM. NVIDIA DGX Spark 128GB has 108.8 GB. With Q4_K_M quantization, expect ~38 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) — 19.3 GB, 38.4 tok/s, Runs well

19.3 GB required108.8 GB available

18% VRAM used

Fit status

Runs well

Decode

38.4 tok/s

TTFT

5047 ms

Safe context

1.8M

Memory

19.3 GB / 108.8 GB

Memory breakdown

Weights4.3 GB

KV Cache0.8 GB

Runtime1.2 GB

Headroom13.1 GB

See how fast it feels

See how fast it feelsDiscoPOP zephyr 7b gemma on NVIDIA DGX Spark 128GB
1st promptCold start — includes initialization
>What is local AI inference?
Local AI inference means running an AI language model directly on your own hardware — your laptop, desktop, or server — instead of sending requests to a remote cloud API.

When you run inference locally the model weights are loaded into your GPU or unified memory. Each token you generate requires reading those weights from memory, so memory bandwidth is the main bottleneck for decode speed.

Key benefits of running locally:
  - Full privacy: your prompts never leave your machine
  - No per-token cost or rate limits
  - Works offline once the model is downloaded
  - Latency depends only on your hardware
2nd promptWarm — model ready, no init overhead
>How much VRAM do I need?
It depends on the model size and quantization level. A rough rule of thumb:

  Model size     Q4 (4-bit)    Q8 (8-bit)    FP16
  7B params      ~4.3 GB       ~7.5 GB       ~14 GB
  13B params     ~7.9 GB       ~13.9 GB      ~26 GB
  70B params     ~42.7 GB      ~74.9 GB      ~140 GB

Most people use 4-bit quantization (Q4_K_M) which gives 90-95% of full quality at a fraction of the memory. A 24 GB GPU can comfortably run most 7B-13B models.
Estimated: 38.4 tok/s decode · 5.0s TTFT (warm) · 96 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	C	Runs well	38.4 tok/s	2753 ms	1.8M
Coding	C	Runs well	38.4 tok/s	5047 ms	1.8M
Agentic Coding	C	Runs well	38.4 tok/s	7341 ms	1.8M
Reasoning	C	Runs well	38.4 tok/s	5964 ms	1.8M
RAG	C	Runs well	38.4 tok/s	9176 ms	1.8M

Quantization options

How DiscoPOP zephyr 7b gemma (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	D39
Q3_K_S	3	3.4 GB	Low	D39
NVFP4	4

Get started

Copy-paste commands to run DiscoPOP zephyr 7b gemma on your machine.

Run

lms load hf-bartowski--discopop-zephyr-7b-gemma-gguf && lms server start

Upgrade options

Hardware that runs DiscoPOP zephyr 7b gemma well

NVIDIA H200 141GBBudget pick

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

Raises estimated decode speed by about 155%.98 tok/s decode

Raises estimated decode speed by about 155%.

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 155%.98 tok/s decode

Raises estimated decode speed by about 155%.

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 155%.98 tok/s decode

Raises estimated decode speed by about 155%.

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

~$30,000 MSRP

Frequently asked questions

Can NVIDIA DGX Spark 128GB run DiscoPOP zephyr 7b gemma?

Yes, NVIDIA DGX Spark 128GB can run DiscoPOP zephyr 7b gemma with a C grade (Runs well). Expected decode speed: 38.4 tok/s.

How much VRAM does DiscoPOP zephyr 7b gemma need?

DiscoPOP zephyr 7b gemma (7B parameters) requires approximately 19.3 GB of memory with Q4_K_M quantization.

What is the best quantization for DiscoPOP zephyr 7b gemma?

The recommended quantization for DiscoPOP zephyr 7b gemma is Q4_K_M, which balances quality and memory efficiency.

What speed will DiscoPOP zephyr 7b gemma run at on NVIDIA DGX Spark 128GB?

On NVIDIA DGX Spark 128GB, DiscoPOP zephyr 7b gemma achieves approximately 38.4 tokens per second decode speed with a time-to-first-token of 5047ms using Q4_K_M quantization.

Can NVIDIA DGX Spark 128GB run DiscoPOP zephyr 7b gemma for coding?

For coding workloads, DiscoPOP zephyr 7b gemma on NVIDIA DGX Spark 128GB receives a C grade with 38.4 tok/s and 1.8M context.

What context window can DiscoPOP zephyr 7b gemma use on NVIDIA DGX Spark 128GB?

On NVIDIA DGX Spark 128GB, DiscoPOP zephyr 7b gemma can safely use up to 1.8M tokens of context. The model's official context limit is —, but available memory constrains the safe maximum.

See all results for NVIDIA DGX Spark 128GB See all hardware for DiscoPOP zephyr 7b gemma

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