AMD Instinct MI455X (432GB)

LAUNCH

Released

2026-07-23

GAMING PERFORMANCE

Gaming Performance Index (GPI)

-No applicable GPI estimate.

GRAPHICS BENCHMARKS

3DMark Score

-

MEMORY & STORAGE

Graphics Memory

432 GB HBM4

Memory Bandwidth

23,300 GB/speak theoretical decimalconversion

Bus Width

-

Memory Transfer Options

-

ARCHITECTURE & COMPUTE

* FP32 describes floating-point throughput, not measured gaming performance. Architecture, clock and method differences affect comparison.

Architecture

CDNA5

Process

-

Platform

-

Base Clock

-

Boost Clock

-

Base Clock Range

-

Boost Clock Range

-

Graphics Frequency

-

Max Dynamic Frequency

2,400 MHzmaximum dynamic

CUDA Cores

-

Max CUDA Cores

-

CUDA Cores per GPU

-

Compute Units

-

Xe Cores

-

FP32 TFLOPS*

Conditions unconfirmed315

Test conditions & details

Test: FP32

Score unit: TFLOPS

Version not recorded

Recorded test: Unknown

Bars align retained values of the same metric and unit. Test conditions may be unconfirmed. The endpoint is a display scale, not a test maximum, comparable device measurement, game FPS ratio or winner.

FP16 (AI) TFLOPS

-

CUDA Compute Capability

-

L2 Cache

192 MB

NVIDIA SMs

-

ROPs

-

RT Core Generation

-

Resolution & frame-rate reference

-

TMUs

-

Tensor Core Generation

-

Transistors

320 billion

POWER & BATTERY

Max GPU Temperature

-

Power

-

Recommended System PSU

-

CONNECTIVITY & EXPANSION

DirectX 12 Ultimate

-

DisplayPort

-

HDCP

-

HDMI

-

PCIe Interface

-

Reference DisplayPort Outputs

-

Reference HDMI Outputs

-

Resizable BAR Support

-

UHBR Mode

-

OTHER SPECIFICATIONS

AV1 Decode

-

AV1 Encode

-

Manufacturer

AMD

NVDEC Engines

-

NVDEC Generation

-

NVENC Engines

-

NVENC Generation

-