Can gemma 3 12b it run on RTX A4500 20GB?

YES — Runs Great

C54Usable

Estimated from fit model

gemma 3 12b it needs ~11.9 GB VRAM. RTX A4500 20GB has 20.0 GB. With Q4_K_M quantization, expect ~68 tok/s.

Runtime: OllamaCapacity: RoomyBandwidth: MediumStack: 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.

Capabilities:

Select quantization to explore

Q4_K_M (Medium quality) — 11.9 GB, 68.2 tok/s, Runs well

11.9 GB required20.0 GB available

60% VRAM used

Fit status

Runs well

Decode

68.2 tok/s

TTFT

2839 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 A4500 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: 68.2 tok/s decode · 2.8s TTFT (warm) · 171 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	68.2 tok/s	1548 ms	108K
Coding	C	Runs well	68.2 tok/s	2839 ms	108K
Agentic Coding	B	Runs well	68.2 tok/s	4129 ms	108K
Reasoning	C	Runs well	68.2 tok/s	3355 ms	108K
RAG	B	Runs well	68.2 tok/s	5162 ms	108K

Quantization options

How gemma 3 12b it (12B params) fits at each quantization level on RTX A4500 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

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 start

Frequently asked questions

Can RTX A4500 20GB run gemma 3 12b it?

Yes, RTX A4500 20GB can run gemma 3 12b it with a C grade (Runs well). Expected decode speed: 68.2 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 A4500 20GB?

On RTX A4500 20GB, gemma 3 12b it achieves approximately 68.2 tokens per second decode speed with a time-to-first-token of 2839ms using Q4_K_M quantization.

Can RTX A4500 20GB run gemma 3 12b it for coding?

For coding workloads, gemma 3 12b it on RTX A4500 20GB receives a C grade with 68.2 tok/s and 108K context.

What context window can gemma 3 12b it use on RTX A4500 20GB?

On RTX A4500 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.

See all results for RTX A4500 20GB See all hardware for gemma 3 12b it

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