Gemma 2 27B needs ~30.6 GB but RX 7900 XT 20GB only has 20.0 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
10.6 GB over capacity — needs offload or smaller quantization
Fit status
Too heavy
Decode
7.1 tok/s
TTFT
27246 ms
Safe context
4K
Memory
30.6 GB / 20.0 GB
Offload
30%
Usable VRAM is the main blocker for this model.
Not enough usable memory
The model needs 30.6 GB, but this setup only exposes 20.0 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 | 10.4 tok/s | 10184 ms | 4K |
| Coding | F | Too heavy | 6.8 tok/s | 28609 ms | 4K |
| Agentic Coding | F | Too heavy | 3.5 tok/s | 80356 ms | 4K |
| Reasoning | F | Too heavy | 6.8 tok/s | 33810 ms | 4K |
| RAG | F | Too heavy | 3.5 tok/s | 100445 ms | 4K |
How Gemma 2 27B (27B params) fits at each quantization level on RX 7900 XT 20GB (20.0 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 10.5 GB | Low | A70 |
Q3_K_S | 3 | 13.2 GB | Low | B70 |
NVFP4Best for your GPU | 4 | 15.1 GB | Medium | B69 |
Q4_K_M | 4 | 16.5 GB | Medium | F0 |
Q5_K_M | 5 | 19.4 GB | High | F0 |
Q6_K | 6 | 22.1 GB | High | F0 |
Q8_0 | 8 | 28.9 GB | Very High | F0 |
F16 | 16 | 55.4 GB | Maximum | F0 |
Opções de upgrade
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
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.
~$2,249 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.
~$2,499 MSRP
NVIDIA A100 40GBMaior saltoMakes 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.
~$10,000 MSRP
No, Gemma 2 27B requires more memory than RX 7900 XT 20GB provides.
Gemma 2 27B (27B parameters) requires approximately 30.6 GB of memory with Q4_K_M quantization.
The recommended quantization for Gemma 2 27B is Q4_K_M, which balances quality and memory efficiency.
On RX 7900 XT 20GB, Gemma 2 27B achieves approximately 6.8 tokens per second decode speed with a time-to-first-token of 28609ms using Q4_K_M quantization.
For coding workloads, Gemma 2 27B on RX 7900 XT 20GB receives a F grade with 6.8 tok/s and 4K context.
On RX 7900 XT 20GB, Gemma 2 27B can safely use up to 4K tokens of context. The model's official context limit is 8K, 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/gemma-2-27b-on-rx-7900-xt-20gb" 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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