Can I Run Kimi K3 on Apple M3 Ultra?
作者： Jakub Rusinowski · 最后更新： 2026年11月11日
No — Kimi K3.1 Pro at MXFP4 needs 1570.2 GB at 8K context (1561.3 GB weights + 8.9 GB KV cache/overhead), and the Apple M3 Ultra's 384 GB usable memory leaves it ~1186.2 GB short.
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Apple M3 Ultra Specs
| VRAM | 512 GB unified memory |
| Memory Bandwidth | 819 GB/s |
Kimi K3.1 Pro on the Apple M3 Ultra: VRAM by quantization
| Quant | VRAM needed | Fits 512 GB? | Max context | Whole PC |
|---|---|---|---|---|
| MXFP4 | 1570.2 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 512 GB of unified memory. 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 MXFP4 on the Apple M3 Ultra: 8K 1570.2 GB ✗ · 32K 1594.6 GB ✗ · 128K 1692 GB ✗. Past 8K it no longer fits 512 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
Why It Does Not Fit
Every Kimi K3 variant requires more VRAM than the Apple M3 Ultra provides (512 GB).
FAQ
Does the Apple M3 Ultra have enough VRAM for Kimi K3?
No — Kimi K3.1 Pro at MXFP4 needs 1570.2 GB at 8K context (1561.3 GB weights + 8.9 GB KV cache/overhead), and the Apple M3 Ultra's 384 GB usable memory leaves it ~1186.2 GB short.
Kimi K3 on Other GPUs
Popular Models on the Apple M3 Ultra
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
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