16 GB VRAM (+4)
C
Adds memory headroom for longer context windows and future model growth.37.9 tok/s decode
Adds memory headroom for longer context windows and future model growth.
~$449 MSRP
Can gemma 3 12b it run on RTX 3080 Ti 12GB?
YES — Tight Fit
C54Usable
○Estimated from fit model
gemma 3 12b it needs ~11.1 GB VRAM. RTX 3080 Ti 12GB has 12.0 GB. With Q4_K_M quantization, expect ~92 tok/s.
Runtime: OllamaCapacity: TightBandwidth: HighStack: BasicBottleneck: Balanced
Share:
Operating mode
Choose the run profile you care about
Interactive favors responsiveness, while light API and scale-out lean harder on serving readiness. The fit stays the same, but the recommendation lens changes.
Current mode
Balanced
Balanced for general local use. Keeps the ranking neutral across personal and serving workflows.
Select quantization to explore
Q4_K_M (Medium quality) — 11.1 GB, 92.2 tok/s, Tight fit
11.1 GB required12.0 GB available
93% VRAM used
Fit status
Tight fit
Decode
92.2 tok/s
TTFT
2100 ms
Safe context
26K
Memory
11.1 GB / 12.0 GB
Memory breakdown
Weights7.3 GB
KV Cache1.4 GB
Runtime1.2 GB
Headroom1.2 GB
See how fast it feels
See how fast it feelsgemma 3 12b it on RTX 3080 Ti 12GB
1st promptCold start — includes initialization
>What is local AI inference?
Local AI inference means running an AI language model directly on your own hardware — your laptop, desktop, or server — instead of sending requests to a remote cloud API.
When you run inference locally the model weights are loaded into your GPU or unified memory. Each token you generate requires reading those weights from memory, so memory bandwidth is the main bottleneck for decode speed.
Key benefits of running locally:
- Full privacy: your prompts never leave your machine
- No per-token cost or rate limits
- Works offline once the model is downloaded
- Latency depends only on your hardware
2nd promptWarm — model ready, no init overhead
>How much VRAM do I need?
It depends on the model size and quantization level. A rough rule of thumb:
Model size Q4 (4-bit) Q8 (8-bit) FP16
7B params ~4.3 GB ~7.5 GB ~14 GB
13B params ~7.9 GB ~13.9 GB ~26 GB
70B params ~42.7 GB ~74.9 GB ~140 GB
Most people use 4-bit quantization (Q4_K_M) which gives 90-95% of full quality at a fraction of the memory. A 24 GB GPU can comfortably run most 7B-13B models.
Estimated: 92.2 tok/s decode · 2.1s TTFT (warm) · 231 tok/s prefill
What limits this setup
This setup is broadly balanced for this model.
Very little memory headroom
You can run the model, but there is not much room left for longer context, bigger batches, extra apps, or future model updates.
Best improvement path
Buy headroom, not only minimum fit
A slightly larger memory tier gives you safer context growth and makes the recommendation more future-proof.
Performance by workload
| Workload | Grade | Fit | Decode | TTFT | Context |
|---|---|---|---|---|---|
| Chat | C | Tight fit | 92.2 tok/s | 1145 ms | 26K |
| Coding | C | Tight fit | 92.2 tok/s | 2100 ms | 26K |
| Agentic Coding | C | Runs with offload (needs ~0.3 GB host RAM) | 63.1 tok/s | 4462 ms | 26K |
| Reasoning | C | Tight fit | 92.2 tok/s | 2482 ms | 26K |
| RAG | C | Runs with offload (needs ~0.3 GB host RAM) | 63.1 tok/s | 5578 ms |
Quantization options
How gemma 3 12b it (12B params) fits at each quantization level on RTX 3080 Ti 12GB (12.0 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 4.7 GB | Low | C52 |
Q3_K_S | 3 | 5.9 GB | Low | C52 |
NVFP4 | 4 |
Get started
Copy-paste commands to run gemma 3 12b it on your machine.
Run
lms load hf-maziyarpanahi--gemma-3-12b-it-gguf && lms server startUpgrade options
Hardware that runs gemma 3 12b it well
16 GB VRAM (+4)
B
Adds memory headroom for longer context windows and future model growth.78.3 tok/s decode
Adds memory headroom for longer context windows and future model growth.
~$749 MSRP
16 GB VRAM (+4)
B
Adds memory headroom for longer context windows and future model growth.73.4 tok/s decode
Adds memory headroom for longer context windows and future model growth.
~$799 MSRP