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HardwareLadder
AI GPU ladder

AMDAI GPU · OAM

MI355X

AMD Instinct MI355X is a CDNA 4 data-center accelerator with 288 GB HBM3E and 8 TB/s of memory bandwidth.

Ladder rank
#1
AI index (H100 SXM = 100)
246.5
Series
Instinct MI350

Specifications

Dense throughput, no sparsity
Architecture CDNA 4
Form factor OAM
Process TSMC N3P
FP16 / BF16 tensor (dense) 2,516.6 TFLOPS
FP8 tensor (dense) 5,033.2 TFLOPS
FP4 tensor (dense) 10,066.3 TFLOPS
Memory 288 GB HBM3E
Memory bandwidth 8 TB/s
Power 1400 W
Launch Jun 2025

AI index

Tensor × bandwidth

100 × √((2,516.6 ÷ 989.4) × (8 ÷ 3.35)) = 246.5

The AI index is the geometric mean of dense 16-bit tensor throughput and memory bandwidth, each relative to the H100 SXM. It is a spec-sheet comparison, not a measured benchmark.

Sources

2 references