Can I Run Gemma 4 12B (Unified) on NVIDIA GeForce RTX 5080?
作者： Jakub Rusinowski · 最后更新： 2026年9月29日
Yes. Gemma 4 12B (Unified) needs 8.7 GB at 8K context (7.2 GB weights + 1.5 GB KV cache/overhead) at Q4_K_M and the NVIDIA GeForce RTX 5080 has 16 GB, leaving about 7.3 GB of headroom, at roughly 85 tok/s (estimated) with room for up to 64K of context.
See what else this hardware can run →
The numbers
| Model | Gemma 4 12B (Unified) |
| Parameters | 12B |
| Quantization | Q4_K_M |
| VRAM needed (8K context) | 8.7 GB |
| NVIDIA GeForce RTX 5080 VRAM | 16 GB |
| Verdict | Runs |
| Max context | 64K |
| Estimated speed | ~85 tok/s |
Gemma 4 12B (Unified) on the NVIDIA GeForce RTX 5080: VRAM by quantization
| Quant | VRAM needed | Fits 16 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 25.4 GB | ✗ No | — | — |
| Q8_0 | 14.2 GB | ✓ Yes | 64K | — |
| Q6_K | 11.3 GB | ✓ Yes | 64K | — |
| Q5_K_M | 9.9 GB | ✓ Yes | 64K | — |
| Q4_K_M | 8.7 GB | ✓ Yes | 64K | — |
| Q3_K_M | 6.6 GB | ✓ Yes | 64K | — |
| Q2_K | 5.4 GB | ✓ Yes | 64K | — |
Assumes an 8K-token context with an f16 KV cache. A longer window needs more; a quantized KV cache needs less. “Max context” is the largest window that still fits in 16 GB. Figures are estimates from parameter count, quantization and memory bandwidth — the analyzer lets you tune KV-cache quant and context.
Context costs VRAM too. At Q4_K_M on the NVIDIA GeForce RTX 5080: 8K 8.7 GB · 32K 9.1 GB · 125K 10.6 GB. Every window this model publishes still fits 16 GB.
What to do next
Nothing to change — run it at Q4_K_M. If you want more capability, check whether the next size up also fits.
No compatible GPU? Gemma 4 12B (Unified) on 16 GB of system RAM, CPU only: runs.
Running Gemma 4 12B (Unified) on this card:
At 2 hrs/day, buying (~$999) beats renting at $0.34/hr after about 4.1 years.
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Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.
Other Gemma 4 sizes on the NVIDIA GeForce RTX 5080
- Gemma 4 31B — runs at a lower quant (21.4 GB)
- Gemma 4 26B-A4B — runs at a lower quant (17 GB)
- Gemma 4 E4B — runs (6.4 GB)
- Gemma 4 E2B — runs (4.7 GB)
Gemma 4 12B (Unified) on nearby hardware
- Intel Arc B580 (12 GB) — runs
- AMD Radeon RX 7900 XT (20 GB) — runs
All Gemma 4 sizes on the NVIDIA GeForce RTX 5080 | Gemma 4 12B (Unified) model page | NVIDIA GeForce RTX 5080 GPU page | VRAM calculator | Check your hardware