Can the RX 7900 XT run Gemma 3 27B?
Yes. Gemma 3 27B needs about 19 GB and the RX 7900 XT has 20 GB of VRAM. Expect about 26 tok/s, about reading speed.
ollama run gemma3:27bFirst time? Install Ollama, then paste that into a terminal.
Gemma 3 27B needsAbout 19 GB
RX 7900 XT has20 GB VRAM
Bandwidth800 GB/s
Estimated speed~26 tok/s
Want it faster?
Speed comes from memory bandwidth: the card reads all 17 GB of active weights for every token. On the RX 7900 XT, gpt-oss 20B runs at about 140 tok/s if you can trade some quality for speed. Cards that run Gemma 3 27B faster:
How we estimate
Speed is roughly memory bandwidth divided by the weights read per token, calibrated on our own rack. Sizes are Ollama's default 4-bit downloads plus about 1.2 GB for context. Real results are usually within about a third. Measured it yourself? Send us the number.
Keep going