Flopper.io GPU Specification Sheet
October 9, 2026
flopper.io/gpu/amd-instinct-mi455xAMD Instinct MI455X
CDNA 5 EAM 2026 TSMC 2nm/3nm
Overview
315.0
FP32 TFLOPS
432 GB
Memory HBM4
23.3 TB/s
Memory Bandwidth
—
TDP
Performance Metrics
| Precision | Peak (dense) | 2:4 Sparse | Bits | Type |
|---|---|---|---|---|
| FP64 | 5.0 | N/A | 64 | Standard |
| FP32 | 315.0 | N/A | 32 | Standard |
| TF32 | — | not published | — | Standard |
| BF16 | 5033.0 | 10066.0 | 16 | Standard |
| FP16 | 5033.0 | 10066.0 | 16 | Standard |
| FP8 | 20133.0 | not published | 8 | Standard |
| FP6 | 20133.0 | not published | — | Standard |
| FP4 | 40265.0 | not published | 4 | Standard |
| INT8 | 5033.0 | 10066.0 | 8 | Standard |
Memory Specifications
- Capacity
- 432 GB
- Type
- HBM4
- Bandwidth
- 23.3 TB/s
- Interface Width
- —
Power & Efficiency
- TDP
- —
- Max power
- —
- FP32 dense TFLOPS per W of TDP
- —
- FP16 dense TFLOPS per W of TDP
- —
Per W of TDP figures divide dense peak by accelerator TDP. Board power only: excludes host CPUs, networking, cooling and facility overhead.
Hardware Details
Vendor: AMD
Architecture: CDNA 5
Process Node: TSMC 2nm/3nm
Form Factor: EAM
Launch Year: 2026
Compute Engine
Work Group Processor: 256
Enterprise Features
Sparsity: Yes