How much VRAM does gemma 3 12b it need?

gemma 3 12b it (12B parameters) requires approximately 11.6 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.

Can it run?

Yes, Intel Arc B580 12GB can run gemma 3 12b it with a C grade (Runs with offload). Expected decode speed: 29.9 tok/s.

CUsable

Runs with offload

Using Q4_K_M in Ollama

Capabilities:

Fit status

Runs with offload

Decode

29.9 tok/s

TTFT

6475 ms

Safe context

17K

Memory

11.6 GB / 12.0 GB

Weights7.3 GB

KV Cache1.9 GB

Runtime1.2 GB

Headroom1.2 GB

Workload	Grade	Fit	Decode	TTFT	Context
Agentic Coding	C	Very compromised (needs ~0.8 GB host RAM)	27.3 tok/s	10318 ms	29K
Chat	C	Tight fit	29.9 tok/s	3532 ms	9K
Coding	C	Runs with offload	29.9 tok/s	6475 ms	17K
RAG	C	Very compromised	40.7 tok/s	8650 ms	29K
Reasoning	C	Runs with offload	29.9 tok/s	7652 ms	17K

How gemma 3 12b it (12B params) fits at each quantization level on Intel Arc B580 12GB (12.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	4.7 GB	Low	D38
Q3_K_S	3	5.9 GB	Low	D40
NVFP4	4

Upgrade options

RX 7600 XT 16GBBudget pick

C22.8 tok/s decode

~$329 MSRP

Intel Arc A770 16GBBest value

C34.4 tok/s decode

~$349 MSRP

RTX 5080 Laptop 16GBBiggest leap

B88.1 tok/s decode

Intel Arc Pro B50 16GBIntel upgrade