Can I Run DeepSeek V4 on AMD Ryzen AI Max+ 395?
Written by Jakub Rusinowski · Last updated July 12, 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 AMD Ryzen AI Max+ 395'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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AMD Ryzen AI Max+ 395 Specs
| VRAM | 128 GB |
| Memory Bandwidth | 256 GB/s |
DeepSeek V4-Flash on the AMD Ryzen AI Max+ 395: 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 AMD Ryzen AI Max+ 395: 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 AMD Ryzen AI Max+ 395 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
Will DeepSeek V4 run on the AMD Ryzen AI Max+ 395?
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 AMD Ryzen AI Max+ 395's 128 GB leaves it ~44.8 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?
The Apple M5 Ultra (512 GB VRAM) is the cheapest upgrade that fits it.
Every DeepSeek V4 size on the AMD Ryzen AI Max+ 395
| 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 NVIDIA DGX Spark
Popular Models on the AMD Ryzen AI Max+ 395
VRAM Tier
Troubleshooting
- Ollama: "model requires more system memory than is available"
- Which GGUF quant should I download? (Q4 vs Q5 vs Q8)
Buying Guide
← Can I Run It? | DeepSeek V4 Model Page | AMD Ryzen AI Max+ 395 GPU Page | VRAM calculator | Check Your Hardware