This document is relevant for: Inf2

Inferentia2 Architecture

At the heart of each Inf2 instance are up to twelve Inferentia2 devices (each with two NeuronCore-v2 cores). Inferentia2 is the second generation AWS purpose-built Machine Learning inference accelerator. The Inferentia2 device architecture is depicted below:

Each Inferentia2 device consists of:

Compute	Two NeuronCore-v2 cores, delivering 380 INT8 TOPS, 190 FP16/BF16/cFP8/TF32 TFLOPS, and 47.5 FP32 TFLOPS.
Device Memory	32GiB of high-bandwidth device memor (HBM) (for storing model state), with 820 GiB/sec of bandwidth.
Data Movement	1 TB/sec of DMA bandwidth, with inline memory compression/decompression.
NeuronLink	NeuronLink-v2 for device-to-device interconnect enables high-performance collective compute for co-optimization of latency and throughput.
Programmability	Inferentia2 supports dynamic shapes and control flow, via ISA extensions of NeuronCore-v2 and custom-operators via the deeply embedded GPSIMD engines.

For a more detailed description of all the hardware engines, see NeuronCore-v2.

This document is relevant for: Inf2