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Device profile · Windows

Best local LLMs for Nvidia GeForce RTX 5090 (32GB)

Nvidia GeForce RTX 5090 (32GB) has ~31 GB usable for model weights and runs 108 of 135 popular models. Best tool: LM Studio.

106 run well 2 tight fit 27 too heavy
Usable memory
~31 GB
Models run
108
Too large
27
Top pick
30.5B
Top pick Q4_K_M

Runs at Q4_K_M using ~20.7 GB of ~31 GB usable.

Runs on Nvidia GeForce RTX 5090 (32GB)

Compatible models 108 total

Best way to run models on Windows

Runtime guide Windows

Beginner: LM Studio, Best GUI on Windows, auto-detects CUDA/Vulkan backends.

Power user: Ollama (CUDA), Scriptable server; CUDA path is fastest on NVIDIA.

AMD GPUs run via Vulkan/ROCm at roughly half CUDA throughput. NVIDIA is the smooth path on Windows.

Full Windows tool guide →

FAQ

What is the best local LLM for Nvidia GeForce RTX 5090 (32GB)?

Qwen3 30B-A3B is the strongest model that runs comfortably, using ~20.7 GB at Q4_K_M of the ~31 GB usable on Nvidia GeForce RTX 5090 (32GB).

How much of Nvidia GeForce RTX 5090 (32GB)'s memory can I use for a model?

About 31 GB. On a discrete GPU, leave ~1 GB of VRAM for the driver and display.

Which tool should I use on Windows?

LM Studio (Best GUI on Windows, auto-detects CUDA/Vulkan backends.) or Ollama (CUDA) for speed. AMD GPUs run via Vulkan/ROCm at roughly half CUDA throughput. NVIDIA is the smooth path on Windows.

Compare nearby devices

Hardware with a similar usable pool, and how many of the 135 tracked models each runs next to Nvidia GeForce RTX 5090 (32GB)'s 108.

Sources

Memory figures are estimates. See methodology.