Can I Run DeepSeek V4.1 Flash on NVIDIA DGX Spark?
Written by Jakub Rusinowski · Last updated October 13, 2026
No. DeepSeek V4.1 Flash needs 462.2 GB at 8K context (460.8 GB weights + 1.4 GB KV cache/overhead) at Q4_K_M and the NVIDIA DGX Spark has only 128 GB. No quantization we publish closes a gap that size.
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The numbers
| Model | DeepSeek V4.1 Flash |
| Parameters | 552B (16B active) |
| Quantization | Q4_K_M |
| VRAM needed (8K context) | 462.2 GB |
| NVIDIA DGX Spark VRAM | 128 GB |
| Verdict | Does not fit |
DeepSeek V4.1 Flash on the NVIDIA DGX Spark: VRAM by quantization
| Quant | VRAM needed | Fits 128 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 1527.8 GB | ✗ No | — | — |
| Q8_0 | 812.3 GB | ✗ No | — | — |
| Q6_K | 627.2 GB | ✗ No | — | — |
| Q5_K_M | 542.3 GB | ✗ No | — | — |
| Q4_K_M | 462.2 GB | ✗ No | — | — |
| Q3_K_M | 326.7 GB | ✗ No | — | — |
| Q2_K | 252.3 GB | ✗ No | — | — |
Assumes an 8K-token context with an f16 KV cache, on an estimated architecture — this model publishes no config we can read. A longer window needs more; a quantized KV cache needs less. “Max context” is the largest window that still fits in 128 GB. Figures are estimates from parameter count, quantization and memory bandwidth — the analyzer lets you tune KV-cache quant and context.
Context costs VRAM too. At Q4_K_M on the NVIDIA DGX Spark: 8K 462.2 GB ✗ · 32K 463.9 GB ✗ · 128K 470.8 GB ✗. Past 8K it no longer fits 128 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
What to do next
Step down to a smaller size in this family — no single consumer card we track fits this one.
No compatible GPU? DeepSeek V4.1 Flash on 256 GB of system RAM, CPU only: still does not fit.
Running DeepSeek V4.1 Flash on this card:
DeepSeek V4.1 Flash needs ~462 GB but this GPU has 128 GB. Rent a 8× H100 (640 GB)-class GPU by the hour instead of buying one:
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Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.
DeepSeek V4.1 Flash on nearby hardware
- NVIDIA RTX PRO 6000 Blackwell (96 GB) — does not fit
- Apple M2 Ultra (192 GB) — does not fit
All DeepSeek V4.1 sizes on the NVIDIA DGX Spark | DeepSeek V4.1 Flash model page | NVIDIA DGX Spark GPU page | VRAM calculator | Check your hardware