Qwen 3 8B needs ~32.9 GB VRAM. NVIDIA DGX Spark 128GB has 0 MB. With F16 quantization, expect ~15 tok/s.
Operating mode
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.
Select quantization to explore
Fit status
Runs well
Decode
36.1 tok/s
TTFT
5365 ms
Safe context
131K
Memory
21.3 GB / 108.8 GB
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.
| Workload | Grade | Fit | Decode | TTFT | Context |
|---|---|---|---|---|---|
| Chat | A | Runs well | 36.1 tok/s | 2927 ms | 131K |
| Coding | F | Too heavy | 6.0 tok/s | 32043 ms | 4K |
| Agentic Coding | A | Runs well | 36.1 tok/s | 7804 ms | 131K |
| Reasoning | A | Runs well | 36.1 tok/s | 6341 ms | 131K |
| RAG | A | Runs well | 36.1 tok/s | 9755 ms | 131K |
How Qwen 3 8B (8B params) fits at each quantization level on NVIDIA DGX Spark 128GB (92.2 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 3.1 GB | Low | A79 |
Q3_K_S | 3 | 3.9 GB | Low | A79 |
NVFP4 | 4 |
Copy-paste commands to run Qwen 3 8B on your machine.
Run
ollama run qwen3:8bUpgrade options
NVIDIA H200 141GBBudget pickRaises estimated decode speed by about 210%.
Adds memory headroom for longer context windows and future model growth.
~$30,000 MSRP
NVIDIA H200 PCIe 141GBBest valueRaises estimated decode speed by about 210%.
Adds memory headroom for longer context windows and future model growth.
~$30,000 MSRP
NVIDIA B200 180GBNVIDIA upgradeRaises estimated decode speed by about 210%.
Adds memory headroom for longer context windows and future model growth.
~$30,000 MSRP
Yes, NVIDIA DGX Spark 128GB can run Qwen 3 8B at F16 quantization (Runs well). The recommended Q4_K_M requires 8.3 GB which exceeds available memory, but at F16 it needs only 32.9 GB. Expected decode speed: 15.0 tok/s.
Qwen 3 8B (8B parameters) requires approximately 8.3 GB at Q4_K_M quantization. On NVIDIA DGX Spark 128GB, it fits at F16 using 32.9 GB.
The recommended quantization is Q4_K_M, but on NVIDIA DGX Spark 128GB the best fitting quantization is F16, which uses 32.9 GB.
On NVIDIA DGX Spark 128GB, Qwen 3 8B achieves approximately 15.0 tokens per second decode speed with a time-to-first-token of 12879ms using F16 quantization.
For coding workloads, Qwen 3 8B on NVIDIA DGX Spark 128GB receives a F grade with 6.0 tok/s and 4K context.
On NVIDIA DGX Spark 128GB, Qwen 3 8B can safely use up to 131K tokens of context at F16 quantization. The model's official context limit is 131K, but available memory constrains the safe maximum.
Paste this snippet into any page to show a live fit card.
<iframe src="https://willitrunai.com/embed/qwen-3-8b-on-dgx-spark-128gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>
Preview:
4.5 GB |
| Medium |
| A79 |
Q4_K_M | 4 | 4.9 GB | Medium | A79 |
Q5_K_M | 5 | 5.8 GB | High | A79 |
Q6_K | 6 | 6.6 GB | High | A79 |
Q8_0 | 8 | 8.6 GB | Very High | A79 |
F16Best for your GPU | 16 | 16.4 GB | Maximum | A80 |
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.