Can I run Qwen3-8B on a Radeon RX 7900 XTX?

Yes

Its published weights (16.4 GB) fit in the 21.6 GB a Radeon RX 7900 XTX can use, with room for ≈ 35K tokens of context.

Full analysis of Qwen3-8B Everything that runs on Radeon RX 7900 XTX Get the weights on Hugging Face

hf download Qwen/Qwen3-8B

Files and context on Radeon RX 7900 XTX

Each file of Qwen3-8B (and of GGUF versions the site has analyzed), and how much context fits next to it, with the context cache in 16-bit or 8-bit.

File	Size	On Radeon RX 7900 XTX	Context (16-bit)	Context (8-bit)
As published	16.4 GB	Fits	35K	40K
Q8_0Qwen/Qwen3-8B-GGUF	8.71 GB	Fits	40K	40K
Q6_KQwen/Qwen3-8B-GGUF	6.73 GB	Fits	40K	40K
Q5_K_MQwen/Qwen3-8B-GGUF	5.85 GB	Fits	40K	40K
Q5_0Qwen/Qwen3-8B-GGUF	5.72 GB	Fits	40K	40K
Q4_K_MQwen/Qwen3-8B-GGUF	5.03 GB	Fits	40K	40K

Qwen3-8B on other hardware

Popular models that run on Radeon RX 7900 XTX

Assumes 90% of the card's memory is usable and at least 4K tokens of context for one conversation, with the context cache in 16-bit unless noted. Fits leaves at least 20% of that memory for context; Tight leaves less.