implementation detail · filed under optimization
FP32 gradient reduction
Gradient reduction uses FP32 precision, restoring the full-precision reduction recipe.
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Evidence
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Rolling back to an earlier checkpoint and moving back to the full FP32 gradient reduction recipe re-stabilized training
usedoptimizationin Nemotron 3 UltraNVIDIA
Filed alongside
Other methods under optimization :: training precision.
NVFP4BF16NVFP4 pre-trainingFP8 mixed-precision trainingFP4+FP8 mixed precisionFP8-precision reinforcement learningMXFP8BF16 gradient reductionBF16 mixed-precision trainingBlock-wise FP8 activation quantization with offloadE2M1FP32 attention-output retentionFP8 storage for the residual stateHigh-precision final network layersMixed-FP8 quantizationMixed-precision trainingNVFP4 fine-grained micro-block scalingTwo-dimensional block quantization