NVIDIA H20 141GB HBM3e

Hopper SXM 2025 4nm

Overview

44.0

FP32 TFLOPS

141 GB

Memory HBM3e

4.0 TB/s

Memory Bandwidth

400 W

TDP

Performance Metrics

Precision	Peak (dense)	2:4 Sparse	Bits	Type
FP64	1.0	N/A	64	Standard
FP32	44.0	N/A	32	Standard
TF32	74.0	not published	32	Standard
BF16	148.0	not published	16	Standard
FP16	148.0	not published	16	Standard
FP8	296.0	592.0	8	Standard
FP6	—	not published	—	Standard
FP4	—	not published	—	Standard
INT8	296.0	not published	8	Standard

Memory Specifications

Capacity: 141 GB
Type: HBM3e
Bandwidth: 4.0 TB/s
Interface Width: —

Power & Efficiency

TDP: 400 W
Max power (Flopper estimate): ~460 W est.
FP32 dense TFLOPS per W of TDP: 0.11 TFLOPS/W
FP16 dense TFLOPS per W of TDP: 0.37 TFLOPS/W

Flopper estimate: 400 W TDP x 1.15. The vendor publishes no maximum board power for this part. Per W of TDP figures divide dense peak by accelerator TDP. Board power only: excludes host CPUs, networking, cooling and facility overhead.

Hardware Details

Vendor: NVIDIA

Architecture: Hopper

Process Node: 4nm

Form Factor: SXM

Launch Year: 2025

Variant: 141GB HBM3e

Interconnect

GPU-to-GPU: NVLink

Bandwidth: 900 GB/s bidirectional, per GPU

Enterprise Features

Sparsity: Yes