Can an AMD Radeon RX 6900 XT run Qwen3-8B?
Yes. Qwen3-8B needs 10.4GB at Q8_0 with llama.cpp and 8K context; the AMD Radeon RX 6900 XT has 16GB of VRAM (15.5GB usable) — grade A+, with decode speed in the interactive tier.
AMD Radeon RX 6900 XT · Qwen3-8B · Q8_0
✅ Fits — grade A+
InteractivebetaROCm/Vulkan performance not yet calibrated
weights 8.71 GBKV cache 1.21 GBoverhead 0.48 GBpool 15.5 GBneeds 10.4 GB
assumes llama.cpp · batch 1 · 8K context · fp16 KV cache
$999 MSRP · as of 2026-07-08
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Every quant, graded
AMD Radeon RX 6900 XT × Qwen3-8B, llama.cpp, 8K context.
| Quant | File size | Fit | Speed tier |
|---|---|---|---|
| Q8_0 | 8.7 GB | Fits · A+ | interactive · beta |
| Q6_K | 6.7 GB | Fits · A+ | interactive · beta |
| Q5_K_M | 5.8 GB | Fits · A+ | interactive · beta |
| Q4_K_M | 5.0 GB | Fits · A+ | interactive · beta |
Qwen3-8B on similar hardware
Verdict computed from published specs and measured GGUF file sizes — see how the math works.