Written by Jakub Rusinowski · Last updated August 15, 2026
No — Kimi K3 doesn't fit the Apple M3 Ultra's 512 GB; you're short by ~413.4 GB even at Q2_K.
| VRAM | 512 GB unified memory |
| Memory Bandwidth | 819 GB/s |
| Quant | VRAM needed | Fits 512 GB? | Max context |
|---|---|---|---|
| F16 | 5604.9 GB | ✗ No | — |
| Q8_0 | 2979.9 GB | ✗ No | — |
| Q6_K | 2300.9 GB | ✗ No | — |
| Q5_K_M | 1989.4 GB | ✗ No | — |
| Q4_K_M | 1695.4 GB | ✗ No | — |
| Q3_K_M | 1198.4 GB | ✗ No | — |
| Q2_K | 925.4 GB | ✗ No | — |
VRAM needed assumes a 4K-token context with an f16 KV cache; “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.
Every Kimi K3 variant requires more VRAM than the Apple M3 Ultra provides (512 GB).
No — Kimi K3 doesn't fit the Apple M3 Ultra's 512 GB; you're short by ~413.4 GB even at Q2_K.
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