Can AI21 Jamba2 3B i1 run on RTX 5070 12GB?

YES — Runs Great

C47Usable

Estimated from fit model

AI21 Jamba2 3B i1 needs ~4.3 GB VRAM. RTX 5070 12GB has 12.0 GB. With Q4_K_M quantization, expect ~57 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: MediumStack: StandardBottleneck: 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) — 4.3 GB, 57.0 tok/s, Runs well

4.3 GB required12.0 GB available

36% VRAM used

Fit status

Runs well

Decode

57.0 tok/s

TTFT

3396 ms

Safe context

367K

Memory

4.3 GB / 12.0 GB

Memory breakdown

Weights1.8 GB

KV Cache0.4 GB

Runtime0.9 GB

Headroom1.2 GB

See how fast it feels

See how fast it feelsAI21 Jamba2 3B i1 on RTX 5070 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: 57.0 tok/s decode · 3.4s TTFT (warm) · 143 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	57.0 tok/s	1853 ms	367K
Coding	C	Runs well	57.0 tok/s	3396 ms	367K
Agentic Coding	C	Runs well	57.0 tok/s	4940 ms	367K
Reasoning	C	Runs well	57.0 tok/s	4014 ms	367K
RAG	C	Runs well	57.0 tok/s	6175 ms	367K

Quantization options

How AI21 Jamba2 3B i1 (3B params) fits at each quantization level on RTX 5070 12GB (12.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	1.2 GB	Low	C47
Q3_K_S	3	1.5 GB	Low	C47
NVFP4	4	1.7 GB	Medium	C47
Q4_K_M	4	1.8 GB	Medium	C47
Q5_K_M	5	2.2 GB	High	C48
Q6_K	6	2.5 GB	High	C48
Q8_0	8	3.2 GB	Very High	C49
F16Best for your GPU	16	6.1 GB	Maximum	C52

Get started

Copy-paste commands to run AI21 Jamba2 3B i1 on your machine.

Run

lms load hf-mradermacher--ai21-jamba2-3b-i1-gguf && lms server start

Frequently asked questions

Can RTX 5070 12GB run AI21 Jamba2 3B i1?

Yes, RTX 5070 12GB can run AI21 Jamba2 3B i1 with a C grade (Runs well). Expected decode speed: 57.0 tok/s.

How much VRAM does AI21 Jamba2 3B i1 need?

AI21 Jamba2 3B i1 (3B parameters) requires approximately 4.3 GB of memory with Q4_K_M quantization.

What is the best quantization for AI21 Jamba2 3B i1?

The recommended quantization for AI21 Jamba2 3B i1 is Q4_K_M, which balances quality and memory efficiency.

What speed will AI21 Jamba2 3B i1 run at on RTX 5070 12GB?

On RTX 5070 12GB, AI21 Jamba2 3B i1 achieves approximately 57.0 tokens per second decode speed with a time-to-first-token of 3396ms using Q4_K_M quantization.

Can RTX 5070 12GB run AI21 Jamba2 3B i1 for coding?

For coding workloads, AI21 Jamba2 3B i1 on RTX 5070 12GB receives a C grade with 57.0 tok/s and 367K context.

What context window can AI21 Jamba2 3B i1 use on RTX 5070 12GB?

On RTX 5070 12GB, AI21 Jamba2 3B i1 can safely use up to 367K tokens of context. The model's official context limit is —, but available memory constrains the safe maximum.

See all results for RTX 5070 12GB See all hardware for AI21 Jamba2 3B i1

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