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Qwen KV Precision Shows Real Quality Gaps

A community test on an AMD R9700 with ROCm reports noticeable quality and long-context retention differences between FP16 and q8_0 KV cache for Qwen3.8-27B. FP16 reportedly produces more careful structured output and maintains performance beyond 120k tokens, challenging the assumption that both formats are equivalent.

Reddit r/LocalLLaMACommunity15h ago#kv-cache#long-context#quantization
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