Pyyan / Compare / Groq LPU vs B300 Blackwell Ultra vs MI400
Groq LPU vs B300 Blackwell Ultra vs MI400
3 of 5GPU & AI Chips · verified 13 Aug 2026
| Specification | Groq LPU | B300 Blackwell Ultra | MI400 |
|---|---|---|---|
| Summary | Inference only, ~18× GPU speed. | 15 PFLOPS dense FP4. | Double NVIDIA's memory capacity. |
| Memory | — | 288GB HBM3e | 432GB HBM4 |
| Bandwidth | — | 8 TB/s | 19.6 TB/s |
| Price | — | ~$40–50K (verify) | — |
| Vendor | Groq | NVIDIA | AMD |
| Category | GPU & AI Chips | GPU & AI Chips | GPU & AI Chips |
| Official | Groq ↗ | NVIDIA ↗ | AMD ↗ |
Highlighted rows are where these differ.
B300 Blackwell Ultra
- 8 TB/s memory bandwidth
- Per-GPU pricing widely misquoted — one source cites rack pricing
Best for frontier training.
MI400
- 19.6 TB/s bandwidth
- 40 PFLOPS FP4
- $7.2B in commitments
Best for large-model inference.