AMD Radeon Pro W7800 48GB vs AMD Radeon Pro W7900 for local LLMs
1 report on the AMD Radeon Pro W7800 48GB and 1 on the AMD Radeon Pro W7900
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 about the same on both (864 GB/s on the AMD Radeon Pro W7800 48GB, 864 on the AMD Radeon Pro W7900). The estimates below compare them on the models people run most.
- Memory
- 48GB
- Memory bandwidth
- 864 GB/s
- FP16 compute
- 90.4 TFLOPS
- Reports
- 1
- Memory
- 48GB
- Memory bandwidth
- 864 GB/s
- FP16 compute
- 123 TFLOPS
- Reports
- 1
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 | AMD Radeon Pro W7800 48GB | AMD Radeon Pro W7900 |
|---|---|---|
| Qwen3.8 27B | 17.6 t/sQ8_0 | 17.6 t/sQ8_0 |
| Qwen3.8 125B · 6B active | 80.1 t/sQ2_K | 80.1 t/sQ2_K |
| DeepSeek V4 Flash 284B · 13B active | doesn't fit at these settings | doesn't fit at these settings |
| Qwen3.6 35B · 3B active | 55.4 t/sQ8_0 | 55.4 t/sQ8_0 |
| Qwen3.6 27B | 17.6 t/sQ8_0 | 17.6 t/sQ8_0 |
| Gemma 4 26B · 4B active | 47.5 t/sQ8_0 | 47.5 t/sQ8_0 |
Change the context, RAM or model in the calculator: AMD Radeon Pro W7800 48GB · AMD Radeon Pro W7900
Every report on each card, with its source: AMD Radeon Pro W7800 48GB · AMD Radeon Pro W7900