8-way fanout design: Single SFF-TA-1016 MCIO 74Pin x8 host splits into two independent SFF-8639 U. 2 68Pin NVMe channels; Built-in dedicated power wiring, delivers stable power supply for dual 2.5 -inch U. 2 NVMe SSD hot-swap operation; Fully compliant with PCIe Gen 4.0 8GT/s bandwidth, optimized for high-density server & OCP storage deployments; Standard controlled impedance twinax cable, eliminates signal crosstalk and attenuation under sustained heavy workloads; 80cm balanced length for tidy routing inside 1U/2U rack servers, locking gold-plated connectors resist vibration