NVIDIA RTX 3080 Laptop 16GB vs NVIDIA RTX 4090 for local LLMs
2 reports on the NVIDIA RTX 3080 Laptop 16GB and 37 on the NVIDIA RTX 4090
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. The estimates below compare them on the models people run most.
NVIDIA RTX 3080 Laptop 16GB
- Memory
- 16GB
- Memory bandwidth
- not on record
- FP16 compute
- not on record
- Reports
- 2
NVIDIA RTX 4090
- Memory
- 24GB
- Memory bandwidth
- 1,008 GB/s
- FP16 compute
- 330 TFLOPS
- Reports
- 37
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 RTX 3080 Laptop 16GB | NVIDIA RTX 4090 |
|---|---|---|
| Qwen3.8 27B | no estimateQ2_K | 36.5 t/sQ4_K_M |
| Qwen3.8 125B · 6B active | doesn't fit at these settings | 19.6 t/sQ2_K, experts in RAM |
| DeepSeek V4 Flash 284B · 13B active | doesn't fit at these settings | doesn't fit at these settings |
| Qwen3.6 35B · 3B active | no estimateQ2_K | 129.3 t/sQ4_K_S |
| Qwen3.6 27B | no estimateQ2_K | 36.5 t/sQ4_K_M |
| Gemma 4 26B · 4B active | no estimateQ3_K_S | 82.3 t/sQ5_K_S |
Change the context, RAM or model in the calculator: NVIDIA RTX 3080 Laptop 16GB · NVIDIA RTX 4090
Every report on each card, with its source: NVIDIA RTX 3080 Laptop 16GB · NVIDIA RTX 4090