Can I Run Gemma 4 26B-A4B on AMD Radeon RX 9070 XT?
作者： Jakub Rusinowski · 最后更新： 2026年9月19日
Not at Q4_K_M — that needs 15.7 GB and the AMD Radeon RX 9070 XT has 16 GB. Drop to Q3_K_M and it fits in 13.6 GB, with up to 8K of context.
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The numbers
| Model | Gemma 4 26B-A4B |
| Parameters | 26B (4B active, MoE) |
| Quantization | Q4_K_M |
| VRAM needed | 15.7 GB |
| AMD Radeon RX 9070 XT VRAM | 16 GB |
| Verdict | Runs at a lower quant |
| Fits at | Q3_K_M (13.6 GB) |
| Max context | 8K |
Gemma 4 26B-A4B on the AMD Radeon RX 9070 XT: VRAM by quantization
| Quant | VRAM needed | Fits 16 GB? | Max context | Whole PC |
|---|---|---|---|---|
| F16 | 53.7 GB | ✗ No | — | — |
| Q8_0 | 29.3 GB | ✗ No | — | Build for this |
| Q6_K | 23 GB | ✗ No | — | — |
| Q5_K_M | 20.1 GB | ✗ No | — | — |
| Q4_K_M | 17.4 GB | ✗ No | — | Build for this |
| Q3_K_M | 12.7 GB | ✓ Yes | 16K | — |
| Q2_K | 10.2 GB | ✓ Yes | 16K | — |
Assumes a 4K-token context with an f16 KV cache, on an estimated architecture — this model publishes no config we can read. 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 AMD Radeon RX 9070 XT: 8K 18.2 GB ✗ · 32K 23.3 GB ✗ · 128K 43.9 GB ✗. Past 8K it no longer fits 16 GB — a q8_0 KV cache buys roughly half of that back, which the calculator will price for you.
What to do next
Quantize to Q3_K_M. That is the cheapest fix — it costs some quality but no money.
No compatible GPU? Gemma 4 26B-A4B on 24 GB of system RAM, CPU only: runs, but it is tight.
Running Gemma 4 26B-A4B on this card:
Gemma 4 26B-A4B needs ~16 GB but this GPU has 16 GB. Rent a RTX 4090 (24 GB)-class GPU by the hour instead of buying one:
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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 AMD Radeon RX 9070 XT
- Gemma 4 31B — runs at a lower quant (18.7 GB)
- Gemma 4 12B (Unified) — runs (7.2 GB)
- Gemma 4 E4B — runs (4.5 GB)
- Gemma 4 E2B — runs (2.9 GB)
Gemma 4 26B-A4B on nearby hardware
- Intel Arc B580 (12 GB) — runs at a lower quant
- AMD Radeon RX 7900 XT (20 GB) — runs
All Gemma 4 sizes on the AMD Radeon RX 9070 XT | Gemma 4 26B-A4B model page | AMD Radeon RX 9070 XT GPU page | Check your hardware