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MXFP4 dense moves prefill off int8-MMQ onto the FP4-MMA path (existing kernel) for a free 1.44x - shippable as a Blackwell dense-quant recommendation. But it's ~17% of the FP4 roofline, so the FP4-MMA kernel is itself untuned: ~4-6x still in the kernel. Sharpens the target to TUNING the FP4-MMA (serves dense+MoE, only path to beat vLLM). Marlin-style W4A16 BF16 is the alt to match on the BF16 ceiling. Assisted-by: Claude:opus-4.8 [Claude Code] Signed-off-by: Ettore Di Giacinto <mudler@localai.io>