StableLM 2 12B needs ~23.3 GB but RTX 4080 Super 16GB only has 16.0 GB. Try a smaller quantization or lighter model.
Operating mode
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
7.3 GB over capacity — needs offload or smaller quantization
Fit status
Too heavy
Decode
23.4 tok/s
TTFT
8257 ms
Safe context
4K
Memory
23.3 GB / 16.0 GB
Offload
30%
Usable VRAM is the main blocker for this model.
Not enough usable memory
The model needs 23.3 GB, but this setup only exposes 16.0 GB of usable VRAM.
Add more VRAM headroom
The first useful upgrade is more dedicated VRAM so you can fit the model without shrinking context or dropping to a much lower quant.
| Workload | Grade | Fit | Decode | TTFT | Context |
|---|---|---|---|---|---|
| Chat | C | Runs with offload (needs ~0.6 GB host RAM) | 44.4 tok/s | 2380 ms | 4K |
| Coding | F | Too heavy | 23.4 tok/s | 8257 ms | 4K |
| Agentic Coding | F | Too heavy | 10.4 tok/s | 27107 ms | 4K |
| Reasoning | F | Too heavy | 23.4 tok/s | 9758 ms | 4K |
| RAG | F | Too heavy | 10.4 tok/s | 33883 ms | 4K |
How StableLM 2 12B (12B params) fits at each quantization level on RTX 4080 Super 16GB (16.0 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 4.7 GB | Low | C48 |
Q3_K_S | 3 | 5.9 GB | Low | C49 |
NVFP4 | 4 | 6.7 GB | Medium | C50 |
Q4_K_M | 4 | 7.3 GB | Medium | C51 |
Q5_K_M | 5 | 8.6 GB | High | C51 |
Q6_KBest for your GPU | 6 | 9.8 GB | High | C51 |
Q8_0 | 8 | 12.8 GB | Very High | F0 |
F16 | 16 | 24.6 GB | Maximum | F0 |
升级选项
RTX 4000 Ada 20GBNVIDIA 升级Makes the model fit on the accelerator instead of staying completely out of reach.
Adds memory headroom for longer context windows and future model growth.
~$1,250 MSRP
RTX 3090 24GB经济之选Makes the model fit on the accelerator instead of staying completely out of reach.
Removes host-memory offload, which is usually the single biggest latency and throughput win.
~$1,499 MSRP
RTX 4090 24GB最佳性价比Makes the model fit on the accelerator instead of staying completely out of reach.
Removes host-memory offload, which is usually the single biggest latency and throughput win.
~$1,599 MSRP
No, StableLM 2 12B requires more memory than RTX 4080 Super 16GB provides.
StableLM 2 12B (12B parameters) requires approximately 23.3 GB of memory with Q5_K_M quantization.
The recommended quantization for StableLM 2 12B is Q5_K_M, which balances quality and memory efficiency.
On RTX 4080 Super 16GB, StableLM 2 12B achieves approximately 23.4 tokens per second decode speed with a time-to-first-token of 8257ms using Q5_K_M quantization.
For coding workloads, StableLM 2 12B on RTX 4080 Super 16GB receives a F grade with 23.4 tok/s and 4K context.
On RTX 4080 Super 16GB, StableLM 2 12B can safely use up to 4K tokens of context. The model's official context limit is 4K, but available memory constrains the safe maximum.
Add more VRAM headroom. The first useful upgrade is more dedicated VRAM so you can fit the model without shrinking context or dropping to a much lower quant.
Paste this snippet into any page to show a live fit card.
<iframe src="https://willitrunai.com/embed/stablelm-2-12b-on-rtx-4080-super-16gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>
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