Question 1

Can I run Gemma 4 31B on a AMD Radeon RX 7900 XT?

Accepted Answer

Yes — AMD Radeon RX 7900 XT runs Gemma 4 31B fully on GPU at the Q3_K_M quantization. Full GPU inference — 20 GB VRAM meets the 20 GB recommendation.

Question 2

What quantization of Gemma 4 31B should I use on a AMD Radeon RX 7900 XT?

Accepted Answer

For 20 GB VRAM on the AMD Radeon RX 7900 XT, the Q3_K_M variant is the best fit. Estimated ~38 tokens/sec on the Q3_K_M quantization.

Question 3

How fast does Gemma 4 31B run on AMD Radeon RX 7900 XT?

Accepted Answer

Roughly 38 tokens/sec for Q3_K_M. Real speed depends on context length, backend (Ollama, llama.cpp, LM Studio), and KV cache size.

Question 4

What if AMD Radeon RX 7900 XT is not enough for Gemma 4 31B?

Accepted Answer

Try a smaller quantization variant or run on CPU + RAM with the trade-off of slower generation.

Quantization	File Size	Min VRAM	Rec VRAM	Context	Verdict	Estimated tok/s
Q3_K_MBest fit	14.5 GB	16.5 GB	20 GB	8K / 256K	Full GPU	~38
Q4_K_M	18.4 GB	20.5 GB	24 GB	8K / 256K	Hybrid CPU+GPU	~11
Q8_0	33.2 GB	35 GB	40 GB	8K / 256K	Hybrid CPU+GPU	~7

Can I Run Gemma 4 31B on AMD Radeon RX 7900 XT?

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