Can I Run DeepSeek V4 on NVIDIA DGX Spark?
Written by Jakub Rusinowski · Last updated July 21, 2026
No — DeepSeek V4-Flash at Q4 (experimental) needs 172.8 GB at 8K context (171.5 GB weights + 1.3 GB KV cache/overhead), and the NVIDIA DGX Spark's 128 GB leaves it ~44.8 GB short. The cheapest card that runs it is the Apple M5 Ultra (512 GB).
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NVIDIA DGX Spark Specs
| VRAM | 128 GB |
| Memory Bandwidth | 273 GB/s |
DeepSeek V4-Flash on the NVIDIA DGX Spark: VRAM by quantization
| Quant | VRAM needed | Fits 128 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 569.4 GB | ✗ No | — | — |
| Q8_0 | 303.1 GB | ✗ No | — | — |
| Q6_K | 234.3 GB | ✗ No | — | — |
| Q5_K_M | 202.7 GB | ✗ No | — | — |
| Q4_K_M | 172.8 GB | ✗ No | — | — |
| Q3_K_M | 122.4 GB | ✓ Yes | 64K | — |
| Q2_K | 94.7 GB | ✓ Yes | 256K | — |
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 (experimental) on the NVIDIA DGX Spark: 8K 172.8 GB ✗ · 32K 174.6 GB ✗ · 128K 181.5 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.
No compatible GPU? DeepSeek V4-Flash on 128 GB of system RAM, CPU only: runs, but it is tight.
Why It Does Not Fit
Every DeepSeek V4 variant requires more VRAM than the NVIDIA DGX Spark provides (128 GB).
Nearest GPU That Fits
Apple M5 Ultra (512 GB VRAM).
DeepSeek V4 needs ~173 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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FAQ
Can I run DeepSeek V4 on the NVIDIA DGX Spark?
No — DeepSeek V4-Flash at Q4 (experimental) needs 172.8 GB at 8K context (171.5 GB weights + 1.3 GB KV cache/overhead), and the NVIDIA DGX Spark's 128 GB leaves it ~44.8 GB short. The cheapest card that runs it is the Apple M5 Ultra (512 GB).
What's the cheapest GPU that runs DeepSeek V4?
The Apple M5 Ultra (512 GB VRAM) is the cheapest upgrade that fits it.
Every DeepSeek V4 size on the NVIDIA DGX Spark
| Size | VRAM at 8K | Verdict | Speed |
|---|---|---|---|
| DeepSeek V4-Pro | 527.4 GB | Does not fit | — |
| DeepSeek V4-Flash | 172.8 GB | Runs at Q3_K_M | — |
DeepSeek V4 on Other GPUs
- DeepSeek V4 on Apple M4 Max
- DeepSeek V4 on Apple M1 Ultra
- DeepSeek V4 on Apple M5 Max
- DeepSeek V4 on AMD Ryzen AI Max+ 395
Popular Models on the NVIDIA DGX Spark
VRAM Tier
Troubleshooting
- CUDA out of memory — why it happens and how to fix it
- Which GGUF quant should I download? (Q4 vs Q5 vs Q8)
Buying Guide
← Can I Run It? | DeepSeek V4 Model Page | NVIDIA DGX Spark GPU Page | VRAM calculator | Check Your Hardware