llamaperf

A40 48GB vs RTX 4090

For running local LLMs · 21 reports across 5 models

Side A
A40 48GB
Vendor
nvidia
VRAM
48GB
Memory
Discrete
Side B
RTX 4090
Vendor
nvidia
VRAM
24GB
Memory
Discrete

Highest reported generation speed by model family

These maxima come from different community setups. Model size, quantization, GPU count, offloading and concurrency may differ. They do not establish which GPU is faster for the same workload. Check the comparison conditions →

ModelA40 48GBRTX 4090
DeepSeek V4 Flashup to 285B31.5n=1180.0n=6
Qwen3.8up to 2400B134.0n=7
DeepSeek V4.1 Flashup to 552B41.1n=3
Gemma 4up to 31B149.6n=2
Qwen3.6up to 35B80.0n=2

More comparisons