AMD Instinct MI455X Full Specs

Summary

32,768 Shaders 2.4GHz

432GB HBM423.3TB/s

Peak·FP32·FP16 314.6 TFLOPS

Form Factor EAM Module

TDP 2500W

Highlights

Peak OPS

Peak OPS FP32 FP16 Tensor MXFP4 Tensor MXFP6 Tensor MXFP8 Tensor FP8-32 Tensor FP16-32 FP16-32 Tensor Sparse Tensor FP32 FP64 Tensor FP64 Tensor BF16 BF16 Tensor Sparse Tensor INT8 Memory Bandwidth

Instinct MI455X40.27 PFLOPSMXFP4 Tensor

x1

Top Score3.35 PFLOPS FP4 Tensor SparseDesktop1xGeForce RTX 5090

x0.08

Theoretical Performance

Clock Speed2400MHz UC·Boost·OC

Peak OPS 40.27 PFLOPSMXFP4 Tensor

MXFP4 Tensor 40.27 PFLOPS

MXFP6 Tensor 20.13 PFLOPS

Tensor FP8-32 20.13 PFLOPS MXFP8 Tensor 20.13 PFLOPS

FP16 314.6 TFLOPS Tensor FP16-32 5.03 PFLOPS FP16-32 Tensor Sparse 10.07 PFLOPS

Tensor BF16 5.03 PFLOPS BF16 Tensor Sparse 10.07 PFLOPS

FP32 314.6 TFLOPS Tensor FP32 314.6 TFLOPS

FP64 4.92 TFLOPS Tensor FP64 4.92 TFLOPS

Tensor INT8 5.03 POPS

Core Config

Shaders 32,768 Shaders

Tensor Cores 256 T-Cores

WGPs 256 WGPs

Clocks

Boost Clock 2.4GHz

Cache

L1 64KB/WGP

L2 Cache 192MB shared

Memory

432GB HBM4

Memory Bus 24576-bit

Memory Speed 7.6GT/s

Memory Bandwidth 23.3TB/s

ECC Yes

Power & Thermals

TDP 2500W

API Support

GFX 12.5

Decoder

Decoder 4x VCN 5.0

Codec JPEG VP9 AVC (H.264) HEVC (H.265) AV1

Card

Form Factor EAM Module

Cooling Liquid

Chip

Manufacturer AMD

Chip Designer AMD

Architecture CDNA 5

Family Instinct

Branding

Codename CDNA 5

Market Segment Server

Release Date Jul 23, 2026

Fabrication

Foundry TSMC

Other Foundries TSMCIO

Fabrication Node N2 N3PIO

Images