M2 Max 64GB vs AMD Radeon 780M for local LLMs
20 reports on the M2 Max 64GB and 6 on the AMD Radeon 780M
Which is faster for local LLMs?
On Gemma 4 26B · 4B active at 4-bit, the M2 Max 64GB has 61.6 generation tokens/s (one run); prompt processing 465.2 tokens/s (one run); the AMD Radeon 780M has 25.0 generation tokens/s (one run); prompt processing 208.7 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 3.4x higher on the M2 Max 64GB (410 GB/s on the M2 Max 64GB, 120 on the AMD Radeon 780M).
- Memory
- 64GB unified
- Memory bandwidth
- 410 GB/s
- FP16 compute
- 13.6 TFLOPS
- Reports
- 20
- Memory
- shared memory unified
- Memory bandwidth
- not on record
- FP16 compute
- not on record
- 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 | AMD Radeon 780M |
|---|---|---|
| Gemma 4 26B · 4B active4-bit | 61.6one runPP 465.2 (one run)MLXcontext not stated | 25.0one runPP 208.7 (one run)llama.cppcontext 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 | AMD Radeon 780M |
|---|---|---|
| Gemma 4 26B · 4B active | 28.2 t/sQ8_0 | not in the calculator yet |
| Qwen3.8 27B | 10.4 t/sQ8_0 | not in the calculator yet |
| Qwen3.8 125B · 6B active | 47.5 t/sQ2_K | not in the calculator yet |
| Qwen3.6 35B · 3B active | 32.9 t/sQ8_0 | not in the calculator yet |
| DeepSeek V4 Flash 284B · 13B active | doesn't fit at these settings | not in the calculator yet |
| Qwen3.6 27B | 10.4 t/sQ8_0 | not in the calculator yet |
| DeepSeek V4.1 Flash 552B · 16B active | doesn't fit at these settings | not in the calculator yet |
Change the context, RAM or model in the calculator: M2 Max 64GB · AMD Radeon 780M
Every report on each card, with its source: M2 Max 64GB · AMD Radeon 780M