Apple M3 Ultra (80c GPU, 512GB) vs Apple M4 Max (40c GPU, 128GB)
Hardware specifications
Compare memory capacity and reported specifications for Apple M3 Ultra (80c GPU, 512GB) and Apple M4 Max (40c GPU, 128GB). Comparable speed evidence depends on matching model, runtime, quantization, context and batch; a specification comparison does not establish a speed winner.
| Device | GPU or unified memory | GPU power rating |
|---|---|---|
| Apple M3 Ultra (80c GPU, 512GB) | 512GB | 100W |
| Apple M4 Max (40c GPU, 128GB) | 128GB | 65W |
Power ratings are not measured whole-system draw. Unified memory is shared with the operating system. Check the exact hardware configuration, artifact size, runtime buffers and KV cache before choosing a device.
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