M4 Max 128GB vs AMD RX 9070 for local LLMs
52 reports on the M4 Max 128GB and 8 on the AMD RX 9070
Which is faster for local LLMs?
On Qwen3.8 27B at 3-bit, the M4 Max 128GB has 23.9 generation tokens/s (2 runs); prompt processing 249.7 tokens/s (2 runs); the AMD RX 9070 has generation speed not reported; prompt processing 600.0 tokens/s (one run). Memory bandwidth, which caps how fast a card can write, is 17% higher on the AMD RX 9070 (546 GB/s on the M4 Max 128GB, 640 on the AMD RX 9070).
- Memory
- 128GB unified
- Memory bandwidth
- 546 GB/s
- FP16 compute
- 18.4 TFLOPS
- Reports
- 52
- Memory
- 16GB
- Memory bandwidth
- 640 GB/s
- FP16 compute
- 145 TFLOPS
- Reports
- 8
Measured on both
Generation and prompt processing speeds from plain runs (one device, one request, no speculative decoding, the whole model in the device's memory) of the same model size at the same bit class. Each side shows the engines and reported context behind its median. Context can mean a configured window or prompt depth, so these are community comparisons with differing settings. How to read these
| Model | M4 Max 128GB | AMD RX 9070 |
|---|---|---|
| Qwen3.8 27B3-bit | 23.92 runsPP 249.7 (2 runs)llama.cppcontext not stated | -0 runsPP 600.0 (one run)llama.cpp128K context |
Estimated by the calculator
The quant the calculator recommends for each card and its estimated speed at a 32,768-token context with 32 GB of system RAM, from memory bandwidth and the model's shape. Where a model was also measured above, the measurement wins.
| Model | M4 Max 128GB | AMD RX 9070 |
|---|---|---|
| Qwen3.8 27B | 6.7 t/sFP16 | 41.7 t/sQ2_K |
| Qwen3.8 125B · 6B active | 30.7 t/sQ5_K_S | doesn't fit at these settings |
| Qwen3.6 35B · 3B active | 21.2 t/sFP16 | 138.0 t/sQ2_K |
| DeepSeek V4 Flash 284B · 13B active | 48.3 t/sQ2_K | doesn't fit at these settings |
| Qwen3.6 27B | 6.7 t/sFP16 | 41.7 t/sQ2_K |
| Gemma 4 26B · 4B active | 18.2 t/sFP16 | 93.0 t/sQ3_K_S |
| DeepSeek V4.1 Flash 552B · 16B active | doesn't fit at these settings | doesn't fit at these settings |
Change the context, RAM or model in the calculator: M4 Max 128GB · AMD RX 9070
Every report on each card, with its source: M4 Max 128GB · AMD RX 9070