MacBook Air M4 24GBBudget pick
24 GB Unified (+8)
C
This setup is broadly balanced for this model.42 tok/s decode
~$1,099 MSRP
Can AI21 Jamba2 3B run on RTX 4070 Ti Super 16GB?
YES — Runs Great
C46Usable
○Estimated from fit model
AI21 Jamba2 3B needs ~4.7 GB VRAM. RTX 4070 Ti Super 16GB has 16.0 GB. With Q4_K_M quantization, expect ~48 tok/s.
Runtime: llama.cppCapacity: RoomyBandwidth: MediumStack: 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.
Select quantization to explore
Q4_K_M (Medium quality) — 4.7 GB, 48.0 tok/s, Runs well
4.7 GB required16.0 GB available
29% VRAM used
Fit status
Runs well
Decode
48.0 tok/s
TTFT
4033 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 feelsAI21 Jamba2 3B on RTX 4070 Ti Super 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: 48.0 tok/s decode · 4.0s TTFT (warm) · 120 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 | 48.0 tok/s | 2200 ms | 531K |
| Coding | C | Runs well | 48.0 tok/s | 4033 ms | 531K |
| Agentic Coding | C | Runs well | 48.0 tok/s | 5867 ms | 531K |
| Reasoning | C | Runs well | 48.0 tok/s | 4767 ms | 531K |
| RAG | C | Runs well | 48.0 tok/s | 7333 ms | 531K |
Quantization options
How AI21 Jamba2 3B (3B params) fits at each quantization level on RTX 4070 Ti Super 16GB (16.0 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 1.2 GB | Low | C45 |
Q3_K_S | 3 | 1.5 GB | Low | C45 |
NVFP4 | 4 | 1.7 GB | Medium | C45 |
Q4_K_M | 4 | 1.8 GB | Medium | C46 |
Q5_K_M | 5 | 2.2 GB | High | C46 |
Q6_K | 6 | 2.5 GB | High | C46 |
Q8_0 | 8 | 3.2 GB | Very High | C47 |
F16Best for your GPU | 16 | 6.1 GB | Maximum | C49 |
Get started
Copy-paste commands to run AI21 Jamba2 3B on your machine.
Run
lms load hf-mradermacher--ai21-jamba2-3b-gguf && lms server startUpgrade options