AMD MI355X

MI355X is an AMD GPU built on CDNA 4 that was announced on October 10, 2024 and will be released in 2H2025.¹

Specifications

Each MI355X GPU has:

• ? XCDs
  • ? CUs (? per XCD)
    • ? Stream Processors (? per CU)
    • ? Matrix Cores (? per CU)
  • ? GHz (peak)
  • ?? structured sparsity
• ? GB HBM?? (? stacks)¹
  • ? TB/s (max)
• ? AMD Infinity Fabric (D2D)
• ? PCIe Gen5 (H2D)
• ? W maximum

Performance

The launch advertised:¹

• 2.3 PF of FP16
• 4.6 PF of FP8
• 9.2 PF of FP6/FP4

The following are theoretical maximum performance in TFLOPS:

Data Type	VFMA	Matrix	Sparse
FP64
FP32
TF32
FP16
BF16
FP8
INT32
INT8

Footnotes

1. https://x.com/patrickmoorhead/status/1844418798650274270?s=46&t=UheQB0-0TrbsB2KvmT7aWQ ↩ ↩² ↩³