AMD Instinct MI250 (CDNA 2)
Overview
The AMD Instinct MI250, released in 2021 and based on the CDNA 2 architecture, is AMD's previous-generation flagship accelerator. Featuring a dual-chip OAM design, 128GB HBM2e memory, and 47.9 TFLOPS FP64 compute, it is the core component of the Frontier supercomputer (the first US exascale supercomputer).
Core Specifications
| Item | Spec |
|---|
| Architecture | CDNA 2 (GFX90A) |
| Process | TSMC 6nm |
| Memory | 128 GB HBM2e (dual-chip) |
| Memory Bandwidth | 3,276.8 GB/s |
| FP32 | 47.9 TFLOPS |
| FP64 | 47.9 TFLOPS (vector) |
| FP64 Matrix | 95.2 TFLOPS (peak) |
| FP16/BF16 Matrix | 383 TFLOPS |
| INT8 Matrix | 766 TOPS |
| TDP | 500 W |
| Interconnect | Infinity Fabric 200 GB/s, PCIe 4.0 |
| Form Factor | OAM (dual-chip) |
Key Features
- CPU-coherent memory architecture (via Infinity Fabric)
- HBM2e high-bandwidth memory
- 3D V-Cache option support (MI250X)
- Dual-chip OAM package
Use Cases
- HPC scientific computing (FP64 advantage)
- AI training (PyTorch/TensorFlow with ROCm)
- Frontier supercomputer (first US exascale)