StableLM 2 12B needs ~22.9 GB but RX 6750 XT 12GB only has 12.0 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
10.9 GB over capacity — needs offload or smaller quantization
Fit status
Too heavy
Decode
4.7 tok/s
TTFT
40871 ms
Safe context
4K
Memory
22.9 GB / 12.0 GB
Offload
50%
Usable VRAM is the main blocker for this model.
Not enough usable memory
The model needs 22.9 GB, but this setup only exposes 12.0 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 | F | Too heavy | 9.1 tok/s | 11627 ms | 4K |
| Coding | F | Too heavy | 4.7 tok/s | 40871 ms | 4K |
| Agentic Coding | F | Too heavy | 3.7 tok/s | 75938 ms | 4K |
| Reasoning | F | Too heavy | 4.7 tok/s | 48302 ms | 4K |
| RAG | F | Too heavy | 3.7 tok/s | 94923 ms | 4K |
How StableLM 2 12B (12B params) fits at each quantization level on RX 6750 XT 12GB (12.0 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 4.7 GB | Low | C51 |
Q3_K_S | 3 | 5.9 GB | Low | C52 |
NVFP4 | 4 |
Upgrade options
Makes the model fit on the accelerator instead of staying completely out of reach.
Raises estimated decode speed by about 477%.
~$899 MSRP
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.
~$999 MSRP
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.
~$1,899 MSRP
No, StableLM 2 12B requires more memory than RX 6750 XT 12GB provides.
StableLM 2 12B (12B parameters) requires approximately 22.9 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 RX 6750 XT 12GB, StableLM 2 12B achieves approximately 4.7 tokens per second decode speed with a time-to-first-token of 40871ms using Q5_K_M quantization.
For coding workloads, StableLM 2 12B on RX 6750 XT 12GB receives a F grade with 4.7 tok/s and 4K context.
On RX 6750 XT 12GB, 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.
Paste this snippet into any page to show a live fit card.
<iframe src="https://willitrunai.com/embed/stablelm-2-12b-on-rx-6750-xt-12gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>
Preview:
6.7 GB |
| Medium |
| C52 |
Q4_K_M | 4 | 7.3 GB | Medium | C52 |
Q5_K_MBest for your GPU | 5 | 8.6 GB | High | C51 |
Q6_K | 6 | 9.8 GB | High | F0 |
Q8_0 | 8 | 12.8 GB | Very High | F0 |
F16 | 16 | 24.6 GB | Maximum | F0 |
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.
