NVIDIA GeForce RTX 3090 Ti for local LLMs
Written by Jakub Rusinowski · Last updated
With 24 GB of GDDR6X at 1,008 GB/s, the RTX 3090 Ti runs 121 catalogued models at Q4_K_M with 8K context. The largest that fits is Qwen 3 32B (~22.8 GB), and the top pick is Laguna XS 2.1 33B-A3B at 85–163 tok/s.
The fastest Ampere consumer card: 24 GB at 1,008 GB/s, matching the RTX 4090's bandwidth over the same capacity. Bought used it is one of the cheapest routes to 24 GB, at the cost of a 450 W board and no FP8.
Models that run on the RTX 3090 Ti
Q4_K_M, 8K context, 24 GB usable. Ranked by quality and speed.
| Model | Memory · marker = 24 GB | VRAM | Speed |
|---|---|---|---|
| Laguna XS 2.1 33B-A3B Poolside Laguna XS 2.1 | 20.7 GB | 85–163 tok/s | |
| Granite 4.0 Small-H 32B-A9B IBM Granite 4.0 | 20.1 GB | 49–95 tok/s | |
| Olmo 3 32B Olmo 3 | 20.1 GB | 19–37 tok/s | |
| Nemotron-Cascade 2 30B-A3B Nemotron Cascade 2 | 19.9 GB | 81–155 tok/s | |
| Gemma 4 31B Gemma 4 | 21.4 GB | 19–37 tok/s | |
| Qwen 3 30B-A3B (MoE) Qwen 3 | 20 GB | 102–196 tok/s | |
| Qwen3-Coder 30B-A3B (MoE) Qwen3-Coder | 20 GB | 102–196 tok/s | |
| GLM-4.7-Flash 30B-A3B GLM-4.7 / GLM-Z1 | 18.9 GB | 86–165 tok/s | |
| Granite 4.1 30B IBM Granite 4.1 | 18.9 GB | 20–39 tok/s | |
| Nemotron 3 Nano Omni 30B-A3B Nemotron 3 Nano Omni | 18.9 GB | 86–165 tok/s | |
| North Mini Code 1.0 30B-A3B North Mini Code | 18.9 GB | 86–165 tok/s | |
| Granite 4.2 30B IBM Granite 4.2 | 18.9 GB | 20–39 tok/s |
Buy it or rent the same memory
Buy the card, or rent a GPU with the same memory by the hour to try models first.
or compare on Vast.ai from $0.35/hr (typical low · varies)
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Speed vs other GPUs
Llama 3.1 8B, Q4_K_M. Estimated ranges. How this is calculated
Specifications
Specs last updated 2026-09-19.
- Memory
- 24 GB GDDR6X
- Memory bandwidth
- 1,008 GB/s
- Memory bus
- 384-bit
- Architecture
- Ampere GA102
- Series
- RTX 30-series
- Board power
- 450 W
- Release year
- 2022
- Launch price
- $1,999
- Compute backends
- CUDA
- Usable for models
- 24 GB
Similar GPUs
Frequently asked questions
Can the NVIDIA GeForce RTX 3090 Ti run local LLMs?
Yes. With 24 GB (24 GB usable by a model) it runs 121 of the catalogued models at Q4_K_M with 8K context; the largest is Qwen 3 32B, needing about 22.8 GB.
How fast is the NVIDIA GeForce RTX 3090 Ti for AI inference?
It is estimated to run Llama 3.1 8B at 63–122 tok/s at Q4_K_M. Llama 3.3 70B does not fit: it needs about 44 GB against 24 GB usable. These are modelled estimates from memory bandwidth, not measurements; the methodology page shows the formula.
What LLMs can I run on 24 GB?
Among the best that fit: Laguna XS 2.1 33B-A3B, Granite 4.0 Small-H 32B-A9B, Olmo 3 32B, Nemotron-Cascade 2 30B-A3B, Gemma 4 31B.