Connects SFF-8654 8i SlimSAS host to 2x U. 2 SFF-8639 NVMe SSDs with PCIe 4.0 x8 bandwidth (up to 64Gbps total). Includes 15-pin SATA power for stable SSD operation without external PCIe power. 85 impedance-matched and AWG30 silver-plated Twinax cables minimize signal loss for PCIe 4.0 reliability. Ideal for rack servers, NAS, and HPC setups needing dense NVMe storage expansion. Supports U. 2 (NVMe) SSDs like Intel Optane, Samsung PM1735, and Micron 9300 series.. Compatible with PCIe 4.0 / 3.0 motherboards and backplanes (non-bifurcation required)