Intel Arc A770 16GB vs Intel Arc B580 12GB for local LLMs
4 reports on the Intel Arc A770 16GB and 5 on the Intel Arc B580 12GB
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 23% higher on the Intel Arc A770 16GB (560 GB/s on the Intel Arc A770 16GB, 456 on the Intel Arc B580 12GB). The estimates below compare them on the models people run most.
- Memory
- 16GB
- Memory bandwidth
- 560 GB/s
- FP16 compute
- 39.3 TFLOPS
- Reports
- 4
- Memory
- 12GB
- Memory bandwidth
- 456 GB/s
- FP16 compute
- 117 TFLOPS
- Reports
- 5
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 | Intel Arc A770 16GB | Intel Arc B580 12GB |
|---|---|---|
| Qwen3.8 27B | 36.5 t/sQ2_K | 1.6 t/sQ8_0, layers on CPU |
| Qwen3.8 125B · 6B active | doesn't fit at these settings | doesn't fit at these settings |
| DeepSeek V4 Flash 284B · 13B active | doesn't fit at these settings | doesn't fit at these settings |
| Qwen3.6 35B · 3B active | 120.8 t/sQ2_K | 13.7 t/sQ6_K, experts in RAM |
| Qwen3.6 27B | 36.5 t/sQ2_K | 1.6 t/sQ8_0, layers on CPU |
| Gemma 4 26B · 4B active | 81.4 t/sQ3_K_S | 74.5 t/sQ2_K |
Change the context, RAM or model in the calculator: Intel Arc A770 16GB · Intel Arc B580 12GB
Every report on each card, with its source: Intel Arc A770 16GB · Intel Arc B580 12GB