M2 Max 64GB vs M3 Max 128GB for local LLMs
20 reports on the M2 Max 64GB and 6 on the M3 Max 128GB
Which is faster for local LLMs?
On Qwen3.5 35B · 3B active at 4-bit, the M2 Max 64GB has 88.9 generation tokens/s (one run); prompt processing 521.5 tokens/s (one run); the M3 Max 128GB has 90.8 generation tokens/s (one run). Those are community reports whose engines and settings differ, so the gap is a rough sign, not a controlled measure of the two cards. Memory bandwidth, which caps how fast a card can write, is about the same on both (410 GB/s on the M2 Max 64GB, 410 on the M3 Max 128GB).
- Memory
- 64GB unified
- Memory bandwidth
- 410 GB/s
- FP16 compute
- 13.6 TFLOPS
- Reports
- 20
- Memory
- 128GB unified
- Memory bandwidth
- 410 GB/s
- FP16 compute
- 14.2 TFLOPS
- Reports
- 6
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 | M2 Max 64GB | M3 Max 128GB |
|---|---|---|
| Qwen3.5 35B · 3B active4-bit | 88.9one runPP 521.5 (one run)MLXcontext not stated | 90.8one runoMLXcontext not stated |
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 | M2 Max 64GB | M3 Max 128GB |
|---|---|---|
| Qwen3.5 35B · 3B active | 32.9 t/sQ8_0 | 16.8 t/sFP16 |
| Qwen3.8 27B | 10.4 t/sQ8_0 | 5.3 t/sFP16 |
| Qwen3.8 125B · 6B active | 47.5 t/sQ2_K | 24.3 t/sQ5_K_S |
| Qwen3.6 35B · 3B active | 32.9 t/sQ8_0 | 16.8 t/sFP16 |
| DeepSeek V4 Flash 284B · 13B active | doesn't fit at these settings | 38.2 t/sQ2_K |
| Qwen3.6 27B | 10.4 t/sQ8_0 | 5.3 t/sFP16 |
| Gemma 4 26B · 4B active | 28.2 t/sQ8_0 | 14.4 t/sFP16 |
Change the context, RAM or model in the calculator: M2 Max 64GB · M3 Max 128GB
Every report on each card, with its source: M2 Max 64GB · M3 Max 128GB