GPU comparison
NVIDIA RTX 3090 (24GB) vs NVIDIA RTX 4090 (24GB) for local LLMs
How the two stack up for running open-source LLMs locally — memory, bandwidth, price, and how many of the 18 tracked models each one can run.
| NVIDIA RTX 3090 (24GB) | NVIDIA RTX 4090 (24GB) | |
|---|---|---|
| Memory | 24.0 GB | 24.0 GB |
| Bandwidth | 936 GB/s | 1008 GB/s |
| Price (approx) | $800 | $1,599 |
| LLMs it runs | 15 of 18 | 15 of 18 |
| Best model it runs | Gemma 4 31B · 31–47 tok/s | Gemma 4 31B · 33–50 tok/s |
The NVIDIA RTX 3090 (24GB) and NVIDIA RTX 4090 (24GB) run the same set of tracked models; pick on price and ecosystem. The NVIDIA RTX 4090 (24GB) has more memory bandwidth (1008 GB/s), so it generates tokens faster at the same model and quant.