NVIDIA H200 141GBコスパ重視141 GB VRAM (+13)4800 GB/s (+4527)
C
Raises estimated decode speed by about 30%.70 tok/sデコード
Raises estimated decode speed by about 30%.
Adds memory headroom for longer context windows and future model growth.
〜$30,000 MSRP
Can HelpingAI2.5 5B i1 run on NVIDIA DGX Spark 128GB?
YES — Runs Great
C43Usable
Estimated from fit model
HelpingAI2.5 5B i1 needs ~17.9 GB VRAM. NVIDIA DGX Spark 128GB has 108.8 GB. With Q4_K_M quantization, expect ~54 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.
Select quantization to explore
Q4_K_M (Medium quality) — 17.9 GB, 53.7 tok/s, Runs well
17.9 GB required108.8 GB available
16% VRAM used
Fit status
Runs well
Decode
53.7 tok/s
TTFT
3605 ms
Safe context
2.5M
Memory
17.9 GB / 108.8 GB
Memory breakdown
Weights3.1 GB
KV Cache0.6 GB
Runtime1.2 GB
Headroom13.1 GB
See how fast it feels
See how fast it feelsHelpingAI2.5 5B i1 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: 53.7 tok/s decode · 3.6s TTFT (warm) · 134 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 | 53.7 tok/s | 1966 ms | 2.5M |
| Coding | C | Runs well | 53.7 tok/s | 3605 ms | 2.5M |
| Agentic Coding | C | Runs well | 53.7 tok/s | 5243 ms | 2.5M |
| Reasoning | C | Runs well | 53.7 tok/s | 4260 ms | 2.5M |
| RAG | C | Runs well | 53.7 tok/s | 6554 ms | 2.5M |
Quantization options
How HelpingAI2.5 5B i1 (5B params) fits at each quantization level on NVIDIA DGX Spark 128GB (92.2 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 2.0 GB | Low | D39 |
Q3_K_S | 3 | 2.5 GB | Low | D39 |
NVFP4 | 4 | 2.8 GB | Medium | D39 |
Q4_K_M | 4 | 3.1 GB | Medium | D39 |
Q5_K_M | 5 | 3.6 GB | High | D39 |
Q6_K | 6 | 4.1 GB | High | D39 |
Q8_0 | 8 | 5.4 GB | Very High | D39 |
F16Best for your GPU | 16 | 10.3 GB | Maximum | D39 |
Get started
Copy-paste commands to run HelpingAI2.5 5B i1 on your machine.
Run
lms load hf-mradermacher--helpingai2-5-5b-i1-gguf && lms server startアップグレードオプション
HelpingAI2.5 5B i1を快適に動かすハードウェア
NVIDIA H200 141GBコスパ重視NVIDIA H200 PCIe 141GBコスパ最良141 GB VRAM (+13)4800 GB/s (+4527)
C
Raises estimated decode speed by about 30%.70 tok/sデコード
Raises estimated decode speed by about 30%.
Adds memory headroom for longer context windows and future model growth.
〜$30,000 MSRP
NVIDIA B200 180GBNVIDIAアップグレード180 GB VRAM (+52)8000 GB/s (+7727)
C
Raises estimated decode speed by about 30%.70 tok/sデコード
Raises estimated decode speed by about 30%.
Adds memory headroom for longer context windows and future model growth.
〜$30,000 MSRP
Frequently asked questions
Can NVIDIA DGX Spark 128GB run HelpingAI2.5 5B i1?
Yes, NVIDIA DGX Spark 128GB can run HelpingAI2.5 5B i1 with a C grade (Runs well). Expected decode speed: 53.7 tok/s.
How much VRAM does HelpingAI2.5 5B i1 need?
HelpingAI2.5 5B i1 (5B parameters) requires approximately 17.9 GB of memory with Q4_K_M quantization.
What is the best quantization for HelpingAI2.5 5B i1?
The recommended quantization for HelpingAI2.5 5B i1 is Q4_K_M, which balances quality and memory efficiency.
What speed will HelpingAI2.5 5B i1 run at on NVIDIA DGX Spark 128GB?
On NVIDIA DGX Spark 128GB, HelpingAI2.5 5B i1 achieves approximately 53.7 tokens per second decode speed with a time-to-first-token of 3605ms using Q4_K_M quantization.
Can NVIDIA DGX Spark 128GB run HelpingAI2.5 5B i1 for coding?
For coding workloads, HelpingAI2.5 5B i1 on NVIDIA DGX Spark 128GB receives a C grade with 53.7 tok/s and 2.5M context.
What context window can HelpingAI2.5 5B i1 use on NVIDIA DGX Spark 128GB?
On NVIDIA DGX Spark 128GB, HelpingAI2.5 5B i1 can safely use up to 2.5M tokens of context. The model's official context limit is —, but available memory constrains the safe maximum.
Is unified memory on NVIDIA DGX Spark 128GB as fast as VRAM for HelpingAI2.5 5B i1?
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.
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