Compatibility check
Can you run Qwen3 0.6B on the Radeon RX 7900 XTX?
Yes. Qwen3 0.6B fits on the Radeon RX 7900 XTX (24 GB) in full FP16/BF16 precision, using about 2.1 GB including a 0.4 GB KV cache at 4,096 tokens. You have comfortable headroom for longer prompts and modest batching.
Memory breakdown
Weights plus a 0.4 GB KV cache at 4,096tokens, against the card's 24 GB. Verdicts leave ~10% headroom for activations and fragmentation.
| Precision | Weights | KV cache | Total | % of 24 GB | Fit |
|---|---|---|---|---|---|
| FP16 / BF16full quality | 1.7 GB | 0.4 GB | 2.1 GB | 9% | Fits |
| INT8 (8-bit)near-full quality | 0.9 GB | 0.4 GB | 1.3 GB | 5% | Fits |
| INT4 (4-bit)GPTQ / AWQ / GGUF Q4 | 0.4 GB | 0.4 GB | 0.8 GB | 3% | Fits |
Planning estimates, not a substitute for profiling. Real usage varies with the inference runtime, batch size, and how much context you actually use — the KV cache grows linearly with prompt length.
GPUs that run Qwen3 0.6B
Cards where this model fits (at its best precision):
Models that fit the Radeon RX 7900 XTX
Other popular models that run on this card:
Go deeper
Frequently asked questions
Can the Radeon RX 7900 XTX run Qwen3 0.6B?
Yes. In FP16 it uses about 2.1 GB, which fits the Radeon RX 7900 XTX's 24 GB.
How much VRAM does Qwen3 0.6B need?
Approximately 1.7 GB in FP16, 0.9 GB in INT8, and 0.4 GB in 4-bit for the weights, plus a KV cache of about 0.4 GB at 4,096 tokens.
Does quantization let Qwen3 0.6B fit on the Radeon RX 7900 XTX?
Yes. Dropping to FP16 / BF16 brings total usage to about 2.1 GB, which fits the 24 GB card with headroom for the KV cache.
What happens to memory with longer context?
The KV cache grows linearly with prompt length. At 4,096 tokens it is about 0.4 GB here; doubling the context roughly doubles that term, so long-context use can push a tight fit over the edge.