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Accelerators

AMD

AMD Instinct MI455X

Accelerators

Process node: 2 nm^*

Processing & platform

Architecture: CDNA 5^*
Process node: 2 nm^*
Reported chip die area: 2,990 mm²^*
Transistors: 320,000 million^*
GPU L2 cache: 192 MB^*
Texture mapping units: 1,024^*
Raster output units: 0^*
Chip foundry: TSMC^*
Card or module format: EAM Module^*
Suggested system PSU: 2,900 W^*
External power connectors: None^*
OpenCL: 2.0^*
Compute processor: MI450^*
Reported accelerator cores: 32,768^*
Device memory: 432 GB^*
Device memory type: HBM4^*
Host interface: PCIe 6.0 x16^*
Declared accelerator TDP: 2,500 W^*

Memory & storage

Video memory: 432 GB^*
Video memory type: HBM4^*
Memory bus: 24,576 bit^*
Rated memory bandwidth: 23,300 GB/s^*

System configuration

Detailed specifications

Specifications 1 · 17 fields

GPU architecture — AMD Instinct MI455X — 432 GB HBM4: CDNA 5^*
Theoretical peak: BF16 tensor dense per GPU — AMD Instinct MI455X — 432 GB HBM4: 5,033^* TFLOPS
Theoretical peak: FP16 tensor dense per GPU — AMD Instinct MI455X — 432 GB HBM4: 5,033^* TFLOPS
Theoretical peak: FP32 non-tensor dense per GPU — AMD Instinct MI455X — 432 GB HBM4: 315^* TFLOPS
Theoretical peak: FP4 tensor dense per GPU — AMD Instinct MI455X — 432 GB HBM4: 40,265^* TFLOPS
Theoretical peak: FP64 non-tensor dense per GPU — AMD Instinct MI455X — 432 GB HBM4: 5^* TFLOPS
Theoretical peak: FP64 tensor dense per GPU — AMD Instinct MI455X — 432 GB HBM4: 5^* TFLOPS
Theoretical peak: FP6 tensor dense per GPU — AMD Instinct MI455X — 432 GB HBM4: 20,133^* TFLOPS
Theoretical peak: FP8 tensor dense per GPU — AMD Instinct MI455X — 432 GB HBM4: 20,133^* TFLOPS
Theoretical peak: INT8 tensor dense per GPU — AMD Instinct MI455X — 432 GB HBM4: 5,033^* TOPS
Physical configuration — AMD Instinct MI455X — 432 GB HBM4: EAM^*
GPU interconnect bandwidth (UALoE (UALink over Ethernet)) bidirectional — AMD Instinct MI455X — 432 GB HBM4: 3,600^* GB/s
GPU interconnect bandwidth per direction — AMD Instinct MI455X — 432 GB HBM4: 1,800^* GB/s
Peak memory bandwidth per GPU — AMD Instinct MI455X — 432 GB HBM4: 23,300^* GB/s
Memory capacity per GPU — AMD Instinct MI455X — 432 GB HBM4: 432^* GB
Memory technology — AMD Instinct MI455X — 432 GB HBM4: HBM4^*
GPU model — AMD Instinct MI455X — 432 GB HBM4: AMD Instinct MI455X^*

Specifications 2 · 29 fields

OpenCL

2.0^*

Reported theoretical BF16 peak

5.0332^* TFLOPS

Scope and conditions

Arithmetic density: Not stated^*

Host interface

PCIe 6.0 x16^*

Memory bus

24,576^* bit

Reported accelerator cores

32,768^*

Reported theoretical FP16 peak

314.6^* TFLOPS

Scope and conditions

Arithmetic density: Not stated^*

Reported theoretical FP32 peak

314.6^* TFLOPS

Scope and conditions

Arithmetic density: Not stated^*

Reported theoretical FP64 peak

4.915^* TFLOPS

Scope and conditions

Arithmetic density: Not stated^*

Declared L1 cache configuration

64 KB (per CU)^*

Declared GPU L2 cache

192 MB^*

Reported display outputs

No outputs^*

Theoretical pixel fill rate

Not supported^*

External power connectors

None^*

Reported chip die area

2990 mm²^*

Chip foundry

TSMC^*

Process node declaration

2 nm^*

Transistors

320.0 billion^*

Compute processor

MI450^*

Declared device memory

432^* GB

Rated memory bandwidth

23.3 TB/s^*

Device memory type

HBM4^*

Raster output units

0^*

Reported shading units

32,768^*

Card or module format

EAM Module^*

Suggested system PSU

2900 W^*

2:4 tensor sparsity

No^*

Declared accelerator TDP

2500 W^*

Theoretical texture fill rate

2,457.6 GTexel/s^*

Texture mapping units

1,024^*

* Provisional data