Will It Run AI

Can ai21labs AI21 Jamba2 3B run on RTX 5080 16GB?

YES — Runs Great

C46Usable
Estimated from fit model

ai21labs AI21 Jamba2 3B needs ~4.7 GB VRAM. RTX 5080 16GB has 16.0 GB. With Q4_K_M quantization, expect ~57 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: HighStack: StandardBottleneck: Balanced
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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) — 4.7 GB, 57.0 tok/s, Runs well
4.7 GB required16.0 GB available
29% VRAM used

Fit status

Runs well

Decode

57.0 tok/s

TTFT

3396 ms

Safe context

531K

Memory

4.7 GB / 16.0 GB

Memory breakdown

Weights1.8 GB
KV Cache0.4 GB
Runtime0.9 GB
Headroom1.6 GB

See how fast it feels

See how fast it feelsai21labs AI21 Jamba2 3B on RTX 5080 16GB
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

WorkloadGradeFitDecodeTTFTContext
ChatCRuns well42.0 tok/s2514 ms531K
CodingCRuns well57.0 tok/s3396 ms531K
Agentic CodingCRuns well57.0 tok/s4940 ms531K
ReasoningCRuns well57.0 tok/s4014 ms531K
RAGCRuns well57.0 tok/s6175 ms531K

Quantization options

How ai21labs AI21 Jamba2 3B (3B params) fits at each quantization level on RTX 5080 16GB (16.0 GB usable).

QuantBitsVRAMQualityFit
Q2_K
2
1.2 GB
LowC45
Q3_K_S
3
1.5 GB
LowC45
NVFP4
4
1.7 GB
MediumC46
Q4_K_M
4
1.8 GB
MediumC46
Q5_K_M
5
2.2 GB
HighC46
Q6_K
6
2.5 GB
HighC46
Q8_0
8
3.2 GB
Very HighC47
F16Best for your GPU
16
6.1 GB
MaximumC49

Get started

Copy-paste commands to run ai21labs AI21 Jamba2 3B on your machine.

Run

lms load hf-bartowski--ai21labs-ai21-jamba2-3b-gguf && lms server start

Frequently asked questions

Can RTX 5080 16GB run ai21labs AI21 Jamba2 3B?

Yes, RTX 5080 16GB can run ai21labs AI21 Jamba2 3B with a C grade (Runs well). Expected decode speed: 57.0 tok/s.

How much VRAM does ai21labs AI21 Jamba2 3B need?

ai21labs AI21 Jamba2 3B (3B parameters) requires approximately 4.7 GB of memory with Q4_K_M quantization.

What is the best quantization for ai21labs AI21 Jamba2 3B?

The recommended quantization for ai21labs AI21 Jamba2 3B is Q4_K_M, which balances quality and memory efficiency.

What speed will ai21labs AI21 Jamba2 3B run at on RTX 5080 16GB?

On RTX 5080 16GB, ai21labs AI21 Jamba2 3B achieves approximately 57.0 tokens per second decode speed with a time-to-first-token of 3396ms using Q4_K_M quantization.

Can RTX 5080 16GB run ai21labs AI21 Jamba2 3B for coding?

For coding workloads, ai21labs AI21 Jamba2 3B on RTX 5080 16GB receives a C grade with 57.0 tok/s and 531K context.

What context window can ai21labs AI21 Jamba2 3B use on RTX 5080 16GB?

On RTX 5080 16GB, ai21labs AI21 Jamba2 3B can safely use up to 531K tokens of context. The model's official context limit is —, but available memory constrains the safe maximum.

See all results for RTX 5080 16GBSee all hardware for ai21labs AI21 Jamba2 3B
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