RTX 3090 24GBGünstige Wahl24 GB VRAM (+4)936 GB/s (+576)
C
Raises estimated decode speed by about 133%.89.5 tok/s Dekodierung
Raises estimated decode speed by about 133%.
ca. $1,499 MSRP
Can gemma 3 12b it run on RTX 4000 Ada 20GB?
YES — Runs Great
C52Usable
Estimated from fit model
gemma 3 12b it needs ~11.9 GB VRAM. RTX 4000 Ada 20GB has 20.0 GB. With Q4_K_M quantization, expect ~38 tok/s.
Runtime: OllamaCapacity: RoomyBandwidth: LowStack: BasicBottleneck: Balanced
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) — 11.9 GB, 38.4 tok/s, Runs well
11.9 GB required20.0 GB available
60% VRAM used
Fit status
Runs well
Decode
38.4 tok/s
TTFT
5047 ms
Safe context
108K
Memory
11.9 GB / 20.0 GB
Memory breakdown
Weights7.3 GB
KV Cache1.4 GB
Runtime1.2 GB
Headroom2.0 GB
See how fast it feels
See how fast it feelsgemma 3 12b it on RTX 4000 Ada 20GB
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: 38.4 tok/s decode · 5.0s TTFT (warm) · 96 tok/s prefill
What limits this setup
This setup is broadly balanced for this model.
No major red flags
This recommendation has enough memory headroom and acceptable estimated speed for the selected workload.
Best improvement path
Performance by workload
| Workload | Grade | Fit | Decode | TTFT | Context |
|---|---|---|---|---|---|
| Chat | C | Runs well | 38.4 tok/s | 2753 ms | 108K |
| Coding | C | Runs well | 38.4 tok/s | 5047 ms | 108K |
| Agentic Coding | C | Runs well | 38.4 tok/s | 7341 ms | 108K |
| Reasoning | C | Runs well | 38.4 tok/s | 5964 ms | 108K |
| RAG | C | Runs well | 38.4 tok/s | 9176 ms | 108K |
Quantization options
How gemma 3 12b it (12B params) fits at each quantization level on RTX 4000 Ada 20GB (20.0 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 4.7 GB | Low | C47 |
Q3_K_S | 3 | 5.9 GB | Low | C48 |
NVFP4 | 4 | 6.7 GB | Medium | C48 |
Q4_K_M | 4 | 7.3 GB | Medium | C49 |
Q5_K_M | 5 | 8.6 GB | High | C50 |
Q6_K | 6 | 9.8 GB | High | C51 |
Q8_0Best for your GPU | 8 | 12.8 GB | Very High | C50 |
F16 | 16 | 24.6 GB | Maximum | F0 |
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-Optionen
Hardware, die gemma 3 12b it gut ausführt
RTX 3090 24GBGünstige WahlRTX 4090 24GBBestes Preis-Leistungs-Verhältnis24 GB VRAM (+4)1008 GB/s (+648)
C
Raises estimated decode speed by about 173%.104.7 tok/s Dekodierung
Raises estimated decode speed by about 173%.
ca. $1,599 MSRP
RTX PRO 4000 Blackwell 24GBNVIDIA-Upgrade24 GB VRAM (+4)672 GB/s (+312)
C
Raises estimated decode speed by about 101%.77.1 tok/s Dekodierung
Raises estimated decode speed by about 101%.
ca. $1,599 MSRP
Frequently asked questions
Can RTX 4000 Ada 20GB run gemma 3 12b it?
Yes, RTX 4000 Ada 20GB can run gemma 3 12b it with a C grade (Runs well). Expected decode speed: 38.4 tok/s.
How much VRAM does gemma 3 12b it need?
gemma 3 12b it (12B parameters) requires approximately 11.9 GB of memory with Q4_K_M quantization.
What is the best quantization for gemma 3 12b it?
The recommended quantization for gemma 3 12b it is Q4_K_M, which balances quality and memory efficiency.
What speed will gemma 3 12b it run at on RTX 4000 Ada 20GB?
On RTX 4000 Ada 20GB, gemma 3 12b it achieves approximately 38.4 tokens per second decode speed with a time-to-first-token of 5047ms using Q4_K_M quantization.
Can RTX 4000 Ada 20GB run gemma 3 12b it for coding?
For coding workloads, gemma 3 12b it on RTX 4000 Ada 20GB receives a C grade with 38.4 tok/s and 108K context.
What context window can gemma 3 12b it use on RTX 4000 Ada 20GB?
On RTX 4000 Ada 20GB, gemma 3 12b it can safely use up to 108K tokens of context. The model's official context limit is —, but available memory constrains the safe maximum.
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