Flopper.io GPU Specification Sheet
September 26, 2026
flopper.io/gpu/amd-instinct-mi455x-oamAMD Instinct MI455X OAM
CDNA 5 OAM 2026
Overview
—
FP32 TFLOPS
432 GB
Memory HBM4
23.3 TB/s
Memory Bandwidth
—
TDP
Performance Metrics
| Precision | Peak (dense) | 2:4 Sparse | Bits | Type |
|---|---|---|---|---|
| FP64 | — | N/A | — | Standard |
| FP32 | — | N/A | — | Standard |
| TF32 | — | not published | — | Standard |
| BF16 | — | not published | — | Standard |
| FP16 | — | not published | — | Standard |
| FP8 | 20132.7 | not published | 8 | Standard |
| FP6 | — | not published | — | Standard |
| FP4 | 40265.3 | not published | 4 | Standard |
| INT8 | — | not published | — | 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: —
Form Factor: OAM
Launch Year: 2026
Variant: OAM
Compute Engine
Work Group Processor: 256
Enterprise Features
Sparsity: Yes