implementation detail · filed under inference & serving
W4A16 quantization
Uses 4-bit weights and 16-bit activations, with the cited example specifying NVFP4 weights and BF16 activations.
Also called W4A16 (weights NVFP4, activations BF16), W4A16.
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One count per evidence span, weakest treatment to strongest.
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Documented in
Evidence
1 span quoted from the sources, strongest treatment first.
W4A16 (weights NVFP4, activations BF16)
usedinference servingin Nemotron 3 UltraNVIDIA
Filed alongside
Other methods under inference & serving :: inference quantization.
FP8 KV-cache quantizationFP8FP4 KV-cache quantizationNVFP4 quantizationFour-Over-SixMXFP4 weight quantizationPost-training quantizationQuantizationBlock-scaled INT8 quantization with stochastic roundingFP8 E4M3 quantizationGGUFMax-based scalingMSE-based scalingMXFP8 activation quantizationNVFP4 KV-cache quantizationNVFP4 ModelOpt re-quantizationSSM cache quantizationAWQ INT4 weight quantization (W4A16)BF16 inferenceBlock-wise E4M3 FP8 weight quantizationChannel-wise quantizationDynamic activation scalingEmbedding and KV-cache quantizationEmpirical bits-per-element budget selection