| Metric | MESU88 HOT | QSFP‑DD (400 Gb/s) | OSFP (400 Gb/s) | |--------|-----------|-------------------|----------------| | Aggregate throughput | | 400 Gb/s | 400 Gb/s | | Power per lane | 0.45 W | 0.78 W | 0.72 W | | Form factor | 2 × 2 mm die | 20 × 20 mm module | 20 × 20 mm module | | Thermal ΔT (full load) | < 5 °C | ~12 °C | ~10 °C | | BER (post‑FEC) | ≤ 10⁻¹² | ≤ 10⁻¹² | ≤ 10⁻¹² |