NVIDIA A40 48GB vs AMD Strix Halo 128GB for local LLMs
8 reports on the NVIDIA A40 48GB and 327 on the AMD Strix Halo 128GB
Which is faster for local LLMs?
Nobody has reported the same model at the same quant on both cards yet, so there's no measured head-to-head. Memory bandwidth, which caps how fast a card can write, is 2.7x higher on the NVIDIA A40 48GB (696 GB/s on the NVIDIA A40 48GB, 256 on the AMD Strix Halo 128GB). The estimates below compare them on the models people run most.
NVIDIA A40 48GB
- Memory
- 48GB
- Memory bandwidth
- 696 GB/s
- FP16 compute
- 150 TFLOPS
- Reports
- 8
AMD Strix Halo 128GB
- Memory
- 128GB unified
- Memory bandwidth
- 256 GB/s
- FP16 compute
- 59 TFLOPS
- Reports
- 327
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.
| Model | NVIDIA A40 48GB | AMD Strix Halo 128GB |
|---|---|---|
| Qwen3.8 27B | 14.2 t/sQ8_0 | 3.5 t/sFP16 |
| Qwen3.8 125B · 6B active | 64.5 t/sQ2_K | 12.6 t/sQ6_K |
| Qwen3.6 35B · 3B active | 44.7 t/sQ8_0 | 12.6 t/sFP16 |
| DeepSeek V4 Flash 284B · 13B active | doesn't fit at these settings | 33.5 t/sQ2_K |
| Qwen3.6 27B | 14.2 t/sQ8_0 | 3.5 t/sFP16 |
| Gemma 4 26B · 4B active | 38.3 t/sQ8_0 | 9.5 t/sFP16 |
Change the context, RAM or model in the calculator: NVIDIA A40 48GB · AMD Strix Halo 128GB
Every report on each card, with its source: NVIDIA A40 48GB · AMD Strix Halo 128GB