Can I Run DeepSeek V4.1 on NVIDIA H100 80GB (PCIe)?
Written by Jakub Rusinowski · Last updated July 21, 2026
No — DeepSeek V4.1 Flash at Q4 (experimental) needs 172.8 GB at 8K context (171.5 GB weights + 1.3 GB KV cache/overhead), and the NVIDIA H100 80GB (PCIe)'s 80 GB leaves it ~92.8 GB short. The cheapest card that runs it is the Apple M5 Ultra (512 GB).
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NVIDIA H100 80GB (PCIe) Specs
| VRAM | 80 GB |
| Memory Bandwidth | 2000 GB/s |
DeepSeek V4.1 Flash on the NVIDIA H100 80GB (PCIe): VRAM by quantization
| Quant | VRAM needed | Fits 80 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 | ✗ No | — | — |
| Q2_K | 94.7 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 80 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 H100 80GB (PCIe): 8K 172.8 GB ✗ · 32K 174.6 GB ✗ · 128K 181.5 GB ✗. Past 8K it no longer fits 80 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
No compatible GPU? DeepSeek V4.1 Flash on 128 GB of system RAM, CPU only: runs, but it is tight.
Why It Does Not Fit
Every DeepSeek V4.1 variant requires more VRAM than the NVIDIA H100 80GB (PCIe) provides (80 GB).
Nearest GPU That Fits
Apple M5 Ultra (512 GB VRAM).
DeepSeek V4.1 needs ~173 GB but this GPU has 80 GB. Rent a 8× H100 (640 GB)-class GPU by the hour instead of buying one:
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FAQ
DeepSeek V4.1 on the NVIDIA H100 80GB (PCIe) — does it fit?
No — DeepSeek V4.1 Flash at Q4 (experimental) needs 172.8 GB at 8K context (171.5 GB weights + 1.3 GB KV cache/overhead), and the NVIDIA H100 80GB (PCIe)'s 80 GB leaves it ~92.8 GB short. The cheapest card that runs it is the Apple M5 Ultra (512 GB).
What GPU should I get instead to run DeepSeek V4.1?
The Apple M5 Ultra (512 GB VRAM) is the cheapest upgrade that fits it.
DeepSeek V4.1 on Other GPUs
- DeepSeek V4.1 on NVIDIA A100 80GB (PCIe)
- DeepSeek V4.1 on Apple M2 Max
- DeepSeek V4.1 on NVIDIA RTX PRO 6000 Blackwell
Popular Models on the NVIDIA H100 80GB (PCIe)
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 V4.1 Model Page | NVIDIA H100 80GB (PCIe) GPU Page | VRAM calculator | Check Your Hardware