AMD Radeon 780M vs AMD Strix Halo 128GB for local LLMs
5 reports on the AMD Radeon 780M and 82 on the AMD Strix Halo 128GB
Which is faster for local LLMs?
On Qwen3.6 35B · 3B active at 8-bit, the AMD Radeon 780M runs at 19.7 tokens per second (2 runs) and the AMD Strix Halo 128GB at 50.4 (2 runs). 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 2.1x higher on the AMD Strix Halo 128GB (120 GB/s on the AMD Radeon 780M, 256 on the AMD Strix Halo 128GB).
- Memory
- shared memory unified
- Memory bandwidth
- not on record
- FP16 compute
- not on record
- Reports
- 5
- Memory
- 128GB unified
- Memory bandwidth
- 256 GB/s
- FP16 compute
- 59 TFLOPS
- Reports
- 82
Measured on both
Median tokens per second 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 quant level. Engines and context lengths can still differ between the runs. How to read these
| Model | AMD Radeon 780M | AMD Strix Halo 128GB |
|---|---|---|
| Qwen3.6 35B · 3B active8-bit | 19.72 runs | 50.42 runs |
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 | AMD Radeon 780M | AMD Strix Halo 128GB |
|---|---|---|
| Qwen3.6 35B · 3B active | not in the calculator yet | 12.6 t/sFP16 |
| Qwen3.8 27B | not in the calculator yet | 3.5 t/sFP16 |
| Qwen3.8 125B · 6B active | not in the calculator yet | 12.6 t/sQ6_K |
| DeepSeek V4 Flash 284B · 13B active | not in the calculator yet | 33.5 t/sQ2_K |
| Qwen3.6 27B | not in the calculator yet | 3.5 t/sFP16 |
| Gemma 4 26B · 4B active | not in the calculator yet | 9.5 t/sFP16 |
| DeepSeek V4.1 Flash 552B · 16B active | not in the calculator yet | doesn't fit at these settings |
Change the context, RAM or model in the calculator: AMD Radeon 780M · AMD Strix Halo 128GB
Every report on each card, with its source: AMD Radeon 780M · AMD Strix Halo 128GB